Release Notes for DS1821+

(2025-02-04)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

What's New

1. Added support for verifying LDAP server certificates when joining a directory. The following limitations apply:
   • Certificate verification for C2 Identity Edge Server is not supported.
   • This configuration cannot be backed up in DSM system configuration backup or Hyper Backup Entire System Backup.
2. Added support for Synology Office Suite APIs, encompassing Synology Drive, Office (Spreadsheet), MailPlus, and Calendar. With RESTful API and Webhook capabilities, you can enable secure integrations and automate workflows. Ensure the following package versions are updated to access these features:
   • Synology Drive Server 3.5.2
   • Synology MailPlus 3.3.1
   • Synology Calendar 2.5.3

Fixed Issues

1. Fixed a security vulnerabilities (Synology-SA-25:01).
2. Fixed a security vulnerabilities (Synology-SA-25:03).

(2024-11-26)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.
3. To enhance product security, the following packages will require a manual update after this release. Please go to the Package Center and click Repair to install the latest versions:
   • Synology Drive Server 3.5.1-26102
     • Note: After repairing Synology Drive Server, Synology Office will not auto-enable. Please go to Package Center > Synology Office, and click Run.
   • Replication Service 1.3.0-0423

Fixed Issues

1. Minor bug fixes.

(2024-11-05)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-24:20).
2. Fixed multiple security vulnerabilities (Synology-SA-24:27).

(2024-09-11)

Important Note

1. After installing this update, you will not be able to downgrade to a previous DSM version.
2. This update will restart your Synology NAS.
3. For the models below, you can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
   • FS Series: FS3017, FS2017, FS1018
   • XS Series: RS18016xs+, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, RS18017xs+, DS3617xs, DS3617xsII, DS3018xs
   • Plus Series: RS2416RP+, RS2416+, DS916+, DS716+II, DS716+, DS216+II, DS216+, DS1817+, DS1517+, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+, DS718+, DS218+, RS1219+
   • Value Series: DS416, DS416play, DS216, DS216play, DS116, RS816, DS1817, DS1517, RS217, DS418play
   • J Series: DS416slim, DS416j, DS216j, DS418j, DS218j, DS419slim, DS119j
4. Starting from this version, the processing of media files using HEVC (H.265), AVC (H.264), and VC-1 codecs will be transitioned from the server to end devices to reduce unnecessary resource usage on the system and enhance system efficiency. These codecs are widespread on end devices such as smartphones, tablets, computers, and smart TVs. If the end device does not support the required codecs, the use of media files may be limited. Refer to this article for workarounds. In addition, please note the following exceptions:
   • Surveillance Station on DSM will continue to support server-side processing of AVC (H.264) streams, see the release notes.
   • Deep Video Analytics (DVA) series models and VisualStation clients will retain support for AVC (H.264) and HEVC (H.265) codecs.
5. To ensure package compatibility, Advanced Media Extensions (AME), File Station, Media Server, Surveillance Station, Synology Drive, Universal Search, Synology Photos and Snapshot Replication will automatically update to the latest version.
6. Video Station is not available on DSM 7.2.2. Refer to this article for workarounds to stream videos to end devices.
7. Updated Storage Manager to 1.0.0-00502 to fix issues. For more information, see the release notes.

Compatibility & Installation

1. The following third-party packages are currently incompatible with DSM 7.2.2. Compatible package versions will be released in the future, and this list will be updated accordingly:
   • BRAVIA Signage
   • TeamViewer

What's New

1. Added support for selecting whether to verify response or assertion signatures for SAML SSO clients.
2. Supports customization of package installation, upgrade, and uninstallation wizards for third-party package developers. Learn more

Fixed Issues

1. Enhanced protection against deletion of immutable snapshots.
2. Enhanced file system error recoverability.
3. Fixed an issue where backing up WriteOnce shared folders in Hyper Backup might occupy extra space.
4. Enhanced the performance of Thick Provisioned LUNs when the volume is nearly full.
5. Enhanced file search performance when there are a large number of files with the same name.
6. Fixed an issue where restarting the system during an entire system backup could prevent volumes from mounting properly.
7. Fixed an issue where scheduled tasks of emptying recycle bins might fail to delete folders only containing the "desktop.ini" file.
8. Fixed an issue where triggering Adaptive MFA or entering incorrect account credentials might cause the auto block function to count login attempts abnormally.
9. Fixed an issue where users might not be able to set up OTP for login.
10. Fixed an issue where uploading IdP metadata might fail when setting up SAML SSO clients.
11. Fixed an issue where users might not return to DS cam or DS finder after using OIDC SSO login.
12. Fixed an issue where users might not receive emails with emergency codes when using 2FA for DSM login.
13. Fixed an issue where data synchronization might fail when creating backup or replication tasks to a remote target server via Snapshot Replication, Hyper Backup, or other packages.
14. Fixed an issue where login might fail when creating backup or replication tasks to a remote target server via Snapshot Replication, Hyper Backup, or other packages.
15. Fixed an issue where OpenVPN might fail to disable gateways.
16. Fixed an issue where using SAML SSO for DSM login might fail if the IdP's response was too long.
17. Fixed an issue where the system might become unresponsive when setting up OIDC SSO clients.
18. Fixed an issue where Resource Monitor might display abnormal connection times in Connections > Connected Users.
19. Fixed an issue where users might not be able to use a hardware security key for DSM login.
20. Fixed a security vulnerability regarding ghostscript (CVE-2024-29510).
21. Fixed security vulnerabilities regarding netatalk (CVE-2024-38439, CVE-2024-38440, CVE-2024-38441).
22. Fixed a security vulnerability regarding Terrapin Attack (CVE-2023-48795).
23. Fixed a security vulnerability regarding glibc (CVE-2023-4911).
24. Minor bug fixes.

(2024-08-26)

This update is recalled on 2024/09/11 to provide clearer details about the DSM and package updates to avoid confusion. This issue is fixed in version 7.2.2-72806.

(2025-02-18)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

What's New

1. Added support for verifying LDAP server certificates when joining a directory. The following limitations apply:
   • Certificate verification for C2 Identity Edge Server is not supported.
   • This configuration cannot be backed up in DSM system configuration backup or Hyper Backup Entire System Backup.

Fixed Issues

1. Fixed a security vulnerabilities (Synology-SA-25:03).

(2024-11-12)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-24:20).

(2024-04-08)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

Fixed Issues

1. Fixed an issue where upgrading from DSM 7.2.1 to later versions could fail.

(2024-01-16)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where Cloud Sync and Drive ShareSync couldn't function properly when Active Insight was running on Synology NAS.
2. Fixed multiple security vulnerabilities

(2023-11-24)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where updating to DSM 7.2.1 nano 2 caused Task Scheduler to be unable to create or edit tasks.

(2023-11-24)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where certain models might experience abnormal shutdown after updating to DSM 7.2.1.
2. Fixed an issue where files deleted locally might still exist on the Hyper Backup destination server.
3. Fixed an issue where file access failed due to errors during soft link creation in Btrfs file systems.
4. Fixed an issue where backing up WriteOnce shared folders in Hyper Backup might cause space consumption.
5. Fixed an issue where SSD read-write cache might cause unexpected restarts of DSM on SA3200D and SA3400D.

(2023-10-12)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where errors might occur when NFS clients accessed information on shared folder.
2. Fixed an issue where enabling OVS might affect the performance of 10Gb network interface controllers.
3. Fixed an issue where volumes containing SSD caches might not be mounted properly after updating from DSM 7.0 to DSM 7.2.1.

(2023-10-31)

Important Note

1. After installing this update, you will not be able to downgrade to a previous DSM version.
2. This update will restart your Synology NAS.
3. DSM 7.2.1-69057 was updated on October 17, 2023. This update includes the following changes:
   • Fixed an issue where errors might occur when NFS clients accessed information on shared folder.
   • Fixed an issue where enabling OVS might affect the performance of 10Gb network interface controllers.
   • Fixed an issue where volumes containing SSD caches might not be mounted properly after updating from DSM 7.0 to DSM 7.2.1.
4. For the models below, you can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
   • FS Series: FS3017, FS2017, FS1018
   • XS Series: RS18016xs+, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, RS18017xs+, DS3617xs, DS3617xsII, DS3018xs
   • Plus Series: RS2416RP+, RS2416+, DS916+, DS716+II, DS716+, DS216+II, DS216+, DS1817+, DS1517+, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+, DS718+, DS218+, RS1219+
   • Value Series: DS416, DS416play, DS216, DS216play, DS116, RS816, DS1817, DS1517, RS217, DS418play
   • J Series: DS416slim, DS416j, DS216j, DS418j, DS218j, DS419slim, DS119j

What's New

1. NFS clients can now access information on shared folder quotas.
2. Updated Storage Manager to 1.0.0-0017 to adjust the following:
   • Storage Manager has been modularized into a package to provide better system maintenance and update flexibility.
   • If a firmware update is required for Synology drives, it will be automatically performed during the DSM update.
   • Creating ext4 volumes is no longer supported for rackmount models.
   • For more information, see the release notes for Storage Manager.
3. Supports password setting by new users via links provided in emails.

Fixed Issues

1. Fixed an issue where Synology Account could not be signed out.
2. Fixed a security vulnerability regarding Ghostscript (CVE-2023-36664).
3. Fixed a security vulnerability regarding Sudo (CVE-2023-22809).
4. Fixed a security vulnerability regarding OpenSSL (CVE-2023-1255).
5. Fixed a security vulnerability regarding Zlib (CVE-2023-37434).

(2025-02-11)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

Fixed Issues

1. Fixed a security vulnerabilities (Synology-SA-24:20).

(2023-08-03)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where, after DSM 7.2-64570 Update 2, the NVMe SSD caches of a high-availability cluster might stop working.
2. Fixed an issue where Synology Account might not be properly signed out.

(2023-07-24)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where deleting snapshots through Snapshot Replication on the destination server might cause unused memory to not be released properly.
2. Fixed an issue where certain models might experience unsuccessful replication with Snapshot Replication after updating to DSM 7.2.
3. Fixed an issue where users signing in to DSM through Synology SSO might be unable to open Synology Office files.
4. Fixed an issue where the system might be unable to send test emails when Synology Account is configured to receive notifications.
5. Adjusted the suggestions generated by Western Digital Device Analytics (WDDA).
6. Fixed an issue where certain models might not display the corresponding storage pool after creating a volume.
7. Fixed an issue where the warning for checksum mismatch did not provide the file path for the files containing the error.
8. Fixed a security vulnerability regarding Ghostscript (CVE-2023-36664).

(2023-06-19)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where Btrfs volumes might not be able to run volume optimization successfully.
2. Fixed an issue where drive replacement might not work properly for SHR storage pools.

(2023-06-20)

Important Note

1. After installing this update, you will not be able to downgrade to a previous DSM version.
2. This update will restart your Synology NAS.
3. Starting from this version, logs for drives will no longer appear in Storage Manager > HDD and will be available only in Log Center.
4. Removed the "Automatically create port forwarding rules" option from QuickConnect advanced settings to increase network security.
5. Users can now create a Btrfs volume of up to 1 PB on specific Synology NAS models. This update automatically converts existing volumes that use the Btrfs (Peta Volume) file system to Btrfs. However, to create a volume larger than 200 TB, a RAID 6 storage pool and at least 64 GB of system memory are still required.Learn more
6. The maximum single volume size supported by RS2423+​/​RS2423RP+ has been adjusted to 200 TB (with a minimum system memory requirement of 32 GB).
7. Starting from this version, only Windows Server 2008 R2 and above versions will be supported. After installing this update, the current Windows Server 2008 domain and earlier versions will be unavailable.
8. DSM 7.2-64570 was updated on June 20, 2023. This update includes the following changes:
   • Updated SMB Service to 4.15.13-0787 to fix the following:
     • Improved the auto-block feature to prevent it from blocking IP addresses in the same subnet as DSM's network interface.
     • Fixed an issue where domain users and groups may experience permission failures after upgrade.
     • For more information, see the release notes for SMB Service.
   • Fixed an issue where Btrfs volumes might not be able to run volume optimization successfully.
   • Fixed an issue where drive replacement might not work properly for SHR storage pools.
9. For the models below, you can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
   • FS Series: FS3017, FS2017, FS1018
   • XS Series: RS18016xs+, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, RS18017xs+, DS3617xs, DS3617xsII, DS3018xs
   • Plus Series: RS2416RP+, RS2416+, DS916+, DS716+II, DS716+, DS216+II, DS216+, DS1817+, DS1517+, RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+, DS718+, DS218+, RS1219+
   • Value Series: DS416, DS416play, DS216, DS216play, DS116, RS816, DS1817, DS1517, RS217, DS418play
   • J Series: DS416slim, DS416j, DS216j, DS418j, DS218j, DS419slim, DS119j

What’s New

1. Added support for WriteOnce shared folders on specific models. This feature is based on the Write Once, Read Many (WORM) technology and can be enabled to prevent files from being modified, deleted, or renamed for a specified period.
2. Added support for volume encryption on specific models. All volume encryption keys are stored in the Encryption Key Vault, which can be set up on a local Synology NAS or via KMIP on a remote Synology NAS.
3. Added support for M.2 NVMe SSD storage pools on specific models.
4. Added more Synology NAS models to support the M2D18 adapter card: RS822RP+, RS822+, RS1221RP+, and RS1221+.
5. Added more SSD cache group management options, including changing the RAID type and replacing a drive.
6. Added support for inline zero-block removal on specific models to increase the efficiency of data deduplication.
7. Adjusted how drive information is presented in Storage Manager. Users can now quickly check the condition of their drives by looking at the "Drive Status" field.
8. Users can now view the amount of used and free space for each storage pool and volume in Storage Manager.
9. Added a warning notification for when the available shared folder quota is low.
10. Supports deleting individual desktop notifications.
11. Supports sending DSM notifications via additional webhook providers, including LINE and Microsoft Teams.
12. Supports creating custom notification rules for system events, giving users greater control over what notifications to receive.
13. Supports exporting a list of users and of groups.
14. Added support for SAML to integrate DSM with external SSO servers.
15. Added the option to allow non-admin users to safely eject USB devices.
16. Users can now manually input the IP addresses or FQDNs of one or more domain controllers in the trusted domain. This allows Synology NAS to sync domain data directly with the specified domain controllers.
17. Users can now enable Synology's email server to send DSM notifications directly to their Synology Account.
18. Added support for Auto Block, which restricts SMB login attempts from abnormal IP addresses.

Fixed Issues

1. Fixed an issue where adding drives to a JBOD storage pool did not expand its capacity.
2. Updated Mbed-TLS to version 2.28.2 to fix multiple security vulnerabilities (CVE-2021-36647, CVE-2022-46392, CVE-2022-46393).
3. Updated Libksba to version 1.6.3 to fix a security vulnerability (CVE-2022-3515).
4. Updated SQLite to version 3.40.0 to fix a security vulnerability (CVE-2022-46908).
5. Updated Certifi to version 2022.12.07 to fix a security vulnerability (CVE-2022-23491).
6. Updated Node.js to version 14.21.1 to fix a security vulnerability (CVE-2022-43548).
7. Updated cURL to version 7.86.0 to fix multiple security vulnerabilities (CVE-2022-27774, CVE-2022-27775, CVE-2022-27776, CVE-2022-27781, CVE-2022-27782, CVE-2022-32205, CVE-2022-32206, CVE-2022-32207, CV E-2022-32221, CVE-2022-35252, CVE-2022-42915, CVE-2022-42916).
8. Updated PHP to version 8.1.9 to fix multiple security vulnerabilities (CVE-2019-11043, CVE-2021-21705, CVE-2022-31625).
9. Updated Sysstat to version 12.7.1 to fix a security vulnerability (CVE-2022-39377).
10. Updated OpenSSL to version 3.0.7 to fix multiple security vulnerabilities (CVE-2022-2068, CVE-2022-2097, CVE-2022-2274, CVE-2022-3358, CVE-2022-3602, CVE-2022-3786).
11. Updated Expat to version 2.5.0 to fix a security vulnerability (CVE-2022-43680).
12. Updated Libtirpc to version 2.87 to fix a security vulnerability (CVE-2021-46828).
13. Updated GnuPG to version 2.2.39 to fix a security vulnerability (CVE-2022-34903).
14. Updated OpenVPN to version 2.5.8 to fix a security vulnerability (CVE-2022-0547).
15. Updated libxml2 to version 2.9.14 to fix a security vulnerability (CVE-2022-23308).
16. Updated GMP to version 6.2.1 to fix a security vulnerability (CVE-2021-43618).
17. Updated ImageMagick to version 6.9.12-61 to fix multiple security vulnerabilities (CVE-2020-25664, CVE-2020-25665, CVE-2020-25666, CVE-2020-25667, CVE-2020-25674, CVE-2020-25675, CVE-2020-25676, CVE-2020-27560, CVE-2020-27750, CVE-2020-27751, CVE-2020-27752, CVE-2020-27753, CVE-2020-27754, CVE-2020-27755, CVE-2020-27756, CVE-2020-27757, CVE-2020-27758, CVE-2020-27759, CVE-2020-27760, CVE-2020-27761, CVE-2020-27762, CVE-2020-27763, CVE-2020-27764, CVE-2020-27765, CVE-2020-27766, CVE-2020-27767, CVE-2020-27768, CVE-2020-27769, CVE-2020-27770, CVE-2020-27771, CVE-2020-27772, CVE-2020-27773, CVE-2020-27774, CVE-2020-27775, CVE-2020-27776, CVE-2020-29599, CVE-2021-20176, CVE-2021-20224, CVE-2021-20241, CVE-2021-20245, CVE-2021-20246, CVE-2021-20309, CVE-2021-3574, CVE-2021-3596, CVE-2021-39212, CVE-2021-4219, CVE-2022-1114, CVE-2022-1115, CVE-2022-28463, CVE-2022-32545, CVE-2022-32546, CVE-2022-32547).
18. Updated FFmpeg to version 4.1.9 to fix multiple security vulnerabilities (CVE-2020-20892, CVE-2020-20902, CVE-2020-21688, CVE-2020-21697, CVE-2021-3566, CVE-2021-38114, CVE-2021-38291).
19. Fixed a security vulnerability regarding Netatalk (CVE-2022-45188).
20. Fixed multiple security vulnerabilities regarding Python3 (CVE-2020-10735, CVE-2021-28861, CVE-2022-45061).
21. Fixed multiple security vulnerabilities regarding iproute2 (CVE-2022-3527, CVE-2022-3529, CVE-2022-3530).
22. Fixed multiple security vulnerabilities regarding D-Bus (CVE-2022-42010, CVE-2022-42011, CVE-2022-42012).
23. Fixed a security vulnerability regarding syslog-ng (CVE-2022-38725).
24. Fixed a security vulnerability regarding inetutils (CVE-2022-39028).
25. Fixed a security vulnerability regarding DNSmasq (CVE-2022-0934).
26. Fixed a security vulnerability regarding BusyBox-udhcp (CVE-2019-5747).
27. Fixed multiple security vulnerabilities regarding Linux Kernel (CVE-2021-22600, CVE-2021-38209, CVE-2021-4037, CVE-2022-0168, CVE-2022-1016, CVE-2022-1729, CVE-2022-1786, CVE-2022-20141, CVE-2022-20368, CVE-2022-2078, CVE-2022-2639, CVE-2022-2905, CVE-2022-29581, CVE-2022-32250, CVE-2022-3524, CVE-2022-3566, CVE-2022-3567, CVE-2022-36879, CVE-2022-36946, CVE-2022-42703).
28. Fixed a security vulnerability regarding Nginx (CVE-2022-3638).
29. Fixed a security vulnerability regarding ghostscript (CVE-2023-28879).
30. Fixed a security vulnerability regarding curl (CVE-2023-23916).
31. Fixed an security vulnerability.(Synology-SA-23:07)
32. Fixed an issue where updating to DSM 7.2 might fail if users' Synology NAS weren't connected to the Internet.
33. Fixed an issue where, when the Encryption Key Vault of encrypted volumes was set on a KMIP server, the system would not be able to auto-unlock these volumes after a restart.
34. Fixed an issue where, if Web Station was installed on an encrypted volume, resetting the system would cause the volume to crash.
35. Updated C2 Identity Edge Server to version 1.52.0-0186 to ensure its availability and functionality.

Limitation

1. S.M.A.R.T. testing for M.2 NVMe SSDs is no longer supported.
2. Starting from DSM 7.2 Beta, Virtual Machine Manager will no longer support creating clusters with older DSM versions. Please update each host in the cluster to the same DSM version or above versions for the Virtual Machine Manager cluster to operate properly.

(2023-05-22)

Important Note

1. This update has been recalled on June 8, 2023, because of an issue where updating to DSM 7.2 might fail if users' Synology NAS were not connected to the Internet. The issue is fixed in version 7.2-64570.

(2025-02-20)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

What's New

1. Added support for verifying LDAP server certificates when joining a directory. The following limitations apply:
   • Certificate verification for C2 Identity Edge Server is not supported.
   • This configuration cannot be backed up in DSM system configuration backup or Hyper Backup Entire System Backup.

Fixed Issues

1. Fixed an issue where the system might display the incorrect status in email notification settings.
2. Fixed an issue where certain packages failed to display after installation.
3. Fixed a security vulnerabilities (Synology-SA-25:03).

(2024-11-26)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.
3. To enhance product security, the following packages will require a manual update after this release. Please go to the Package Center and click Repair to install the latest versions:
   • Synology Drive Server 3.2.1-23280
     • Note: After repairing Synology Drive Server, Synology Office will not auto-enable. Please go to Package Center > Synology Office, and click Run.
   • Replication Service 1.2.2-0353

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-24:20).
2. Fixed multiple security vulnerabilities (Synology-SA-24:02).
3. Fixed multiple security vulnerabilities (Synology-SA-24:01).
4. Fixed security vulnerabilities regarding netatalk (CVE-2024-38439, CVE-2024-38440, CVE-2024-38441).
5. Fixed a security vulnerability regarding Terrapin Attack (CVE-2023-48795).

(2023-06-05)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where, if the space reclamation process had encountered a heavy workload, the file system may be unable to mount after a system restart.
2. Fixed an issue where the system was unable to display an expansion unit's storage pools if the unit had not been properly connected during a restart.
3. Fixed an issue where the S.M.A.R.T. test results of NVMe SSDs could not be displayed.

(2023-04-12)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.
3. Users of HD6500 can now create a Btrfs volume of up to 1 PB. This update automatically converts existing volumes that use the Btrfs (Peta Volume) file system to Btrfs. However, to create a volume larger than 200 TB, a RAID 6 storage pool and at least 64 GB of system memory are still required.

What’s New

1. Updated OpenSSL to version 1.1.1t to fix multiple security vulnerabilities (CVE-2023-0286, CVE-2023-0215, CVE-2022-4450, CVE-2022-4304).

Fixed Issues

1. Fixed an issue where users couldn't access DSM via the Bonjour service.
2. Fixed stability issue of QuickConnect connections.
3. Fixed an issue where Synology mobile apps remained signed in after users ended all connections following a password change.
4. Fixed an issue of space reclamation not running according to the set schedule.
5. Fixed a display issue concerning the notification about incompatible network interface cards.

(2023-02-20)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Compatibility & Installation

1. The following drives will be updated automatically to the latest firmware version to fix an unexpected issue that may occur during repair or other read/write operations: HAT5300-4T (firmware version 1401 and 1402), HAT5300-16T (firmware version 1401), HAT5310-8T (firmware version 1401), and HAS5300-16T (firmware version 1401).

What’s New

1. Added support for E10G22-T1-Mini with an alternative source of hardware components.
2. Added support for SSD cache on HD6500.

Fixed Issues

1. Fixed an issue where drives added to a RAID Group in a Synology High Availability cluster were not allocated correctly between RAID arrays.

(2022-12-08)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed multiple security vulnerabilities. (Synology-SA-22:23)

(2022-10-20)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

What’s New

1. When users select Outlook as the system notification service provider, they will need to sign in with OAuth 2.0, which is a safer authentication method. Previously configured Outlook accounts will be migrated to "Custom SMTP server". We strongly recommend re-configuring the settings for authentication to ensure your Outlook account security.

Fixed Issues

1. Fixed an issue where performing file system checks on ext4 volumes would stop the quota settings on DSM from functioning.
2. Fixed an issue where after HDD migration, users couldn't properly mount the SSD caches that weren't migrated to the new device.
3. Fixed an issue where Universal Search couldn't find the data in shared folders on volumes that were created on DSM 7.1.1.
4. Fixed an issue where users couldn't access DSM from certain devices.
5. Fixed an issue where users couldn't access DSM via the Bonjour service.
6. Fixed an issue where the E10G18-T1 network card couldn't be detected on the passive server when creating a Synology High Availability cluster with RC18015xs+.
7. Fixed an issue where models with the AMD Ryzen V1000 CPU platform couldn't adjust the fan speed automatically after a system reboot.
8. Fixed multiple security vulnerabilities regarding Out-of-Band (OOB). (Synology-SA-22:17)

(2022-09-22)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.

Fixed Issues

1. Fixed an issue where users might not be able to change the desktop background.
2. Fixed an issue where volumes might become read-only due to data block allocation problems.
3. Fixed an issue where LUN backup tasks in Hyper Backup might fail after updating DSM 7.1.1.

(2022-10-20)

Important Notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 7.1 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart your Synology NAS.
3. Starting from this version, the bad sector count column will not be displayed along with hard drive information. Users should go to each drive's Health Info > History to view its complete bad sector information. To determine whether bad sectors are affecting the drive, see if there's a significant increase in the number of bad sectors over time.
4. Adjusted how the system calculates the estimated lifespan for M.2 NVMe SSDs to provide a more accurate estimation.
5. AAC-encoded content can be decoded and natively played back by most end devices, such as smartphones, tablets, computers, and smart TVs. Server-side transcoding of AAC-encoded content has been a redundant and resource-consuming process that was removed starting from DSM 7.1.1.
6. Surveillance Station must be updated to version 9.0.1- 7673 or above to be compatible with this update.
7. DSM 7.1.1-42962 was updated on September 27, 2022, to fix the issue where updating to DSM 7.1.1 might fail if users' Synology NAS weren't connected to the Internet.
8. DS414j users are recommended to keep their current DSM version if they are using or plan to use Synology Photos. The package version compatible with DSM 7.1.1 is currently under development and is scheduled to release in November.

What’s New

1. Added support for recipient profiles for email notifications, allowing users to add multiple email addresses under each profile and customize rules for the profiles.
2. Users can now enable the quota setting for shared folders that are located on volumes with data deduplication enabled.
3. Added support for RAID arrays with 16 and 20 hard drives when creating RAID groups.
4. Supports checking the 2-factor authentication status of user accounts at Control Panel > User & Group > Users.
5. Added support for SR-IOV on the following the Synology network interface cards: E10G21-F2, E25G21-F2.

Fixed Issues

1. Fixed an issue where the "Enable UID/GID shifting" setting would be deactivated after modifying the time interval for updating the user/group list on an LDAP client.
2. Fixed multiple security vulnerabilities regarding CIFS-utils (CVE-2022-27239, CVE-2022-29869).
3. Fixed a security vulnerability regarding OpenLDAP (CVE-2022-29155).
4. Fixed a security vulnerability regarding cURL (CVE-2022-22576).
5. Fixed a security vulnerability regarding Zlib (CVE-2018-25032).
6. Fixed a security vulnerability regarding Freetype (CVE-2022-27406).
7. Fixed multiple security vulnerabilities regarding 802.1X (CVE-2021-30004, CVE-2021-30266).
8. Fixed multiple security vulnerabilities regarding GNU C Library(CVE-2021-43396, CVE-2022-23218, CVE-2022-23219).
9. Fixed multiple security vulnerabilities regarding YAML-cpp (CVE-2018-20573, CVE-2018-20574, CVE-2019-6285).
10. Fixed multiple security vulnerabilities regarding Linux Kernel (CVE-2019-11477, CVE-2019-11478, CVE-2019-11479, CVE-2020-12770, CVE-2019-18282, CVE-2019-19527, CVE-2019-19532, CVE-2019-19537, CVE-2021-0605, CVE-2021-3732, CVE-2021-3739, CVE-2021-3753, CVE-2021-4149, CVE-2021-4203, CVE-2021-20317, CVE-2021-20321, CVE-2021-20322, CVE-2021-29154, CVE-2021-29650, CVE-2021-34556, CVE-2021-35477, CVE-2021-39633, CVE-2021-39698, CVE-2021-45868, CVE-2022-0185, CVE-2022-0330, CVE-2022-0617, CVE-2022-0847, CVE-2022-1011, CVE-2022-1048, CVE-2022-1055, CVE-2022-1353, CVE-2022-20008, CVE-2022-27666, CVE-2022-28893, CVE-2022-29582).
11. Updated OpenSSL to version 1.1.1o to fix multiple security vulnerabilities (CVE-2022-1292, CVE-2021-3712, CVE-2022-0778).
12. Updated libarchive to version 3.6.1 to fix multiple security vulnerabilities (CVE-2021-36976, CVE-2022-26280).
13. Updated Mbed-TLS to version 2.28 to fix multiple security vulnerabilities (CVE-2021-44732, CVE-2021-45450, CVE-2021-43666).
14. Updated Python to version 3.8.12 to fix multiple security vulnerabilities (CVE-2021-3733, CVE-2021-3737, CVE-2022-0391).
15. Updated Redis to version 6.2.7 to fix multiple security vulnerabilities (CVE-2022-24735, CVE-2022-24736).
16. Updated ISC DHCP to version 4.4.3 to fix a security vulnerability (CVE-2021-25217).

(2022-08-02)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 7.1 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where after restarting DSM, certain packages might fail to function properly if users had installed Synology High Availability.
2. Fixed an issue where users might not be able to sign in to their Gmail account when configuring the sender at Control Panel > Notification > Email.

(2022-07-21)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 7.1 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an unexpected issue that may occur when users Safe Ejected a single-volume storage pool that was created on DSM 6.2.4 or earlier.
2. Fixed an issue where certain packages couldn't function properly shortly after restarting DSM.
3. Fixed an unexpected issue that may occur when users tried to repair degraded storage pools that were previously migrated from a different version of DSM.

Known Issues

1. We suggest that you stay with your current DSM version if you are using or plan to use Synology High Availability. This new version might cause certificate problems with SHA clusters. We will release a version including the patch for this issue in the upcoming weeks.

(2022-06-01)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 7.1 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart your Synology NAS.

Compatibility & Installation

1. When an SSD's firmware version doesn't support the S.M.A.R.T test, the system will disable related functions.

Fixed Issues

1. Fixed an issue where the out-of-band port couldn't function properly when users configured Link Aggregation with only the ports on the external network card.
2. Fixed an issue where users couldn't configure access via QuickConnect for Synology Drive Server because they couldn't find the package at Control Panel > External Access > QuickConnect > Advanced.

(2022-04-27)

Important Note

1. The update is expected to be available in all regions shortly. If you want to update your DSM to this version now, please click here.
2. This update will restart your Synology NAS.
3. If users' Synology NAS aren't connected to the Internet, they must download SMB Service 4.10.18-0434 from the Download Center and manually install it after the DSM update to make sure the package functions properly. Note: Before users install SMB Service 4.10.18-0434, the package and its dependent package, Synology Directory Server, will be deactivated.

Fixed Issues

1. Fixed an issue where users couldn't upload files to DSM via the Finder on macOS Big Sur 11.
2. Fixed multiple security vulnerabilities regarding Netatalk (Synology-SA-22:06).

(2022-06-08)

Important notes

1. DSM 7.1-42661 is updated on May 04 to fix the issues below.
   • Fixed an issue where users couldn't upload files to DSM via the Finder on macOS Big Sur 11.
   • Fixed multiple security vulnerabilities regarding Netatalk (Synology-SA-22:06).
2. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly. If you want to update to the latest version now, please go to Synology Download Center and manually update your DSM.
3. This update will restart your Synology NAS.
4. After installing this update, you will not be able to downgrade to a previous DSM version.
5. For the following models, you can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
   • XS Series: RS3413xs+, RS10613xs+, RS3614xs+, RS3614xs, RS3614RPxs, RC18015xs+, DS3615xs, DS2015xs
   • Plus Series: DS2413+, DS1813+, DS1513+, DS713+, RS2414RP+, RS2414+, RS814RP+, RS814+, DS214+, RS815RP+, RS815+, DS2415+, DS1815+, DS1515+, DS415+, DS215+
   • Value Series: RS814, RS214, DS414, DS214, DS214play, DS114, RS815, DS1515,DS715, DS415play, DS115
   • J Series: DS213j, DS414slim, DS414j, DS214se, DS215j, DS115j, DS216se, DS119j
6. For the following models, DSM 7.1 will be the last upgradable version.
   • XS Series: RS3413xs+, RS10613xs+, RS3614xs+, RS3614xs, RS3614RPxs, RC18015xs+, DS3615xs, DS2015xs
   • Plus Series: DS2413+, DS1813+, DS1513+, DS713+, RS2414RP+, RS2414+, RS814RP+, RS814+, DS214+, RS815RP+, RS815+, DS2415+, DS1815+, DS1515+, DS415+, DS215+
   • Value Series: RS814, RS214, DS414, DS214, DS214play, DS114, RS815, DS1515,DS715, DS415play, DS115
   • J Series: DS213j, DS414slim, DS414j, DS214se, DS215j, DS115j, DS216se
7. Adjusted the LED indicator for drives' health status. When a drive's health status is critical or failing, the indicator will show static orange.
8. Windows 2000 domains are no longer supported.
9. Removed the "Synchronize with an NTP server every time a domain user signs in" option for Domain/LDAP advanced settings. Users can configure the "Synchronize with NTP server" option at Regional Options > Time instead.
10. Added support for the UPS power-off function at Control Panel > Hardware & Power > UPS.
11. Synology Storage Replication Adapter can only be used with DSM 7.0.1 or earlier versions. If you are using or plan to use Synology Storage Replication Adapter, please continue to use the current DSM version.
12. To create a new Virtual DSM machine for DSM 7.1, Virtual Machine Manager (VMM) must be updated to version 2.6. Virtual DSM machines running DSM 7.0 or earlier versions can be directly updated to DSM 7.1 without updating VMM.
13. Surveillance Station must be updated to version 8.2.11-7327 or above to be compatible with this update.
14. Fixed multiple security vulnerabilities.(Synology-SA-22:18)
15. Fixed an security vulnerability.(Synology-SA-23:05)

What’s New

1. SSD Cache Groups can be allocated to multiple volumes, allowing for more flexible management of SSD cache capacity.
2. Storage Manager now supports the management of the drives and storage of both active server and passive server in a Synology High Availability cluster.
3. Added support for Btrfs (Peta Volume) in Active Backup for Business and Synology High Availability.
4. If there is a file system error, DSM will unmount the volume to run file system checks without interrupting the services on other volumes.
5. Reduced the minimum threshold for low capacity notification from 5% to 3%.
6. Added support for custom OIDC (OpenID Connect) settings to integrate DSM with external SSO servers.
7. Added support for the RTF editor to allow users to preview notification message content and style in real-time when editing.
8. Added support for bypass traverse checking at Control Panel > File Services > Advanced to allow users to traverse folders and access permitted files or subfolders.
9. Supports specifying domains from the list of trusted domains to synchronize domain data.
10. Added the Greenwich Mean Time (GMT+00:00) time zone option at Control Panel > Regional Options > Time.
11. Added the synchronization status between DSM and NTP servers at Control Panel > Regional Options > Time.
12. Added icons on the taskbar to indicate ongoing background tasks that might affect system performance.
13. Users can now open tabs directly from search results in Control Panel.
14. Supports automatically updating the domain database and syncing domain data regularly. For Synology NAS that are used to create domains, the "Update User Groups/Lists" option in Control Panel > Domains/LDAP will be disabled by default after updating to DSM 7.1.
15. Starting from Advanced Media Extensions 2.0.0, users must sign in to their Synology Accounts in DSM to install HEVC and AAC codecs in the package, which allows for the playback of certain file formats in multimedia packages and Surveillance Station.(Learn more)

Limitation

1. The update progress bar on a Synology High Availability cluster might not display the actual progress percentage. This won't affect the update progress.

(2024-11-28)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-24:02).
2. Fixed multiple security vulnerabilities (Synology-SA-24:01).
3. Fixed multiple security vulnerabilities (Synology-SA-23:05).
4. Fixed security vulnerabilities regarding netatalk (CVE-2024-38439, CVE-2024-38440, CVE-2024-38441).
5. Fixed a security vulnerability regarding Terrapin Attack (CVE-2023-48795).

(2023-01-04)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.
3. AAC-encoded content can be decoded and natively played back by most end devices, such as smartphones, tablets, computers, and smart TVs. Server-side transcoding of AAC-encoded content has been a redundant and resource-consuming process that was removed in DSM 7.0 starting from this version.
4. When users select Outlook as the system notification service provider, they will need to sign in with OAuth 2.0, which is a safer authentication method. Previously configured Outlook accounts will be migrated to "Custom SMTP server". We strongly recommend re-configuring the settings for authentication to ensure your Outlook account security.
5. Advanced Media Extensions must be updated to version 1.1.2-0301 to be compatible with this update.
6. Video Station must be updated to version 3.0.5-2503 to be compatible with this update.
7. Audio Station must be updated to version 7.0.3-5401 to be compatible with this update.
8. Media Server must be updated to version 2.0.4-3150 to be compatible with this update.

Compatibility & Installation

1. The following drives will be updated automatically to the latest firmware version to fix an unexpected issue that may occur during repair or other read/write operations: HAT5300-4T (firmware version 1401 and 1402), HAT5300-16T (firmware version 1401), HAT5310-8T (firmware version 1401), and HAS5300-16T (firmware version 1401).

Fixed Issues

1. Fixed multiple security vulnerabilities. (Synology-SA-22:23)

(2022-06-23)

Important notes

1. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where DSM on hybrid Synology High Availability clusters with certain configuration couldn't be updated, and the passive server would be removed from the cluster after the update failure.
2. Fixed an issue where certain user interface text wasn't displayed correctly during DSM installation.

(2022-05-18)

Important notes

1. The update is expected to be available in all regions shortly. If you want to update your DSM to this version now, please click here.

Compatibility & Installation

1. Surveillance Station will restart automatically to ensure it functions normally after the DSM update.

Fixed Issues

1. Fixed an issue where the DSM versions on the active and passive server in a Synology High Availability cluster were different because the passive server wasn't connected to the internet during system update.
2. Fixed security vulnerabilities regarding Netatalk (Synology-SA-22:06). Note: SMB Service must be updated to 4.10.18-0329.
3. Fixed an issue where Synology High Availability clusters might misjudge that the NFS service failed and performed failover.

(2022-03-01)

Important Note

1. The update is expected to be available in all regions shortly. If you want to update your DSM to this version now, please click here.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where the SSD read-write cache might cause DSM to unexpectedly restart.
2. Fixed an issue where users could still edit the shared folders that are being moved, potentially resulting in unexpected data deletion.
3. Fixed an issue where users couldn’t add Google or Outlook accounts at Personal > Email Delivery.
4. Fixed an issue where sending a test email would fail if users selected Outlook as the service provider.
5. Fixed multiple security vulnerabilities. (Synology-SA-22:03)

(2022-01-13)

Important Note

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 7.0.1 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where DSM falsely identified errors in the license files of certain packages.
2. Fixed an issue where package logs weren't rotated after a switchover was performed on SA3200D.
3. Fixed an issue where Synology Account might be signed out unexpectedly.
4. Fixed an issue where the user interface response time might be longer when users ran user-defined scripts that included bind mounts.
5. Fixed an issue where the time attribute of files on an exFAT-formatted external storage device was displayed incorrectly.
6. Fixed an issue where there might be unexpected file permission changes in Surveillance Station due to multi-threaded file processing.
7. Fixed an issue where SSD caches might stop functioning when there is insufficient system memory.
8. Fixed an issue where mounting an encrypted shared folder on a Btrfs volume might fail.
9. Fixed multiple security vulnerabilities. (Synology-SA-22:01)

(2022-01-13)

Important Note

This update has been recalled on January 12, 2022, because of falsely identified license file errors. The issue is fixed in version 7.0.1-42218-2.

(2023-02-02)

Important notes

1. DSM 7.0.1-42218 is updated on 2023 Feb 02 to fix the issues below.
   • Fixed multiple security vulnerabilities. (Synology-SA-22:23).
2. AAC-encoded content can be decoded and natively played back by most end devices, such as smartphones, tablets, computers, and smart TVs. Server-side transcoding of AAC-encoded content has been a redundant and resource-consuming process that was removed in DSM 7.0 starting from this version.

Before Update

1. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly. If you want to update to the latest version now, please go to Synology Download Center and manually update your DSM.
2. DSM 7.0.1 will restart your Synology NAS.
3. After installing DSM 7.0.1, you will not be able to downgrade to a previous DSM version.
4. Before updating, your Synology NAS should be running DSM 6.2 or above versions.
5. Reserve extra time to complete DSM 7.0.1 update. The DSM update takes 10 to 20 minutes, while the package update may take more than an hour. The actual time depends on the computing power of your model, the number of media indexing files, and the number of packages installed.
6. If you're performing a clean installation, make sure to complete the installation with find.synology.com or Synology Assistant 7.0-50029 or above.
7. To avoid possible compatibility issues, users who installed Active Insight, Synology Photos, and Secure SignIn mobile applications during DSM 7.0 Preview/Beta programs should update the applications to the latest version after the DSM update.
8. DSM 7.0.1 consumes more system resources, including memory. We suggest that you check your NAS has at least 1 GB of memory before updating.
9. This version of DSM is compatible with the models below.
   • FS-Series: FS6400, FS3600, FS3400, FS3017, FS2017, FS1018
   • SA-Series: SA3600, SA3400, SA3200D
   • 21-Series: RS2821RP+, RS2421RP+, RS2421+, RS1221RP+, RS1221+, DS1821+, DS1621+, DS1621xs+, DVA3221, RS4021xs+, RS3621xs+, RS3621RPxs
   • 20-Series: RS820RP+, RS820+, DS1520+, DS920+, DS720+, DS620slim, DS420+, DS420j, DS220+, DS220j, DS120j
   • 19-Series: RS1219+, RS819, DS2419+II, DS2419+, DS1819+, DS1019+, DS419slim, DS119j, DVA3219, RS1619xs+
   • 18-Series: RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+, DS718+, DS418, DS418play, DS418j, DS218+, DS218, DS218play, DS218j, DS118, RS3618xs, DS3018xs
   • 17-Series: RS217, DS1817+, DS1817, DS1517+, DS1517, RS4017xs+, RS3617xs+, RS3617xs, RS3617RPxs, RS18017xs+, DS3617xs, DS3617xsII
   • 16-Series: RS2416RP+, RS2416+, RS816, DS916+, DS716+II, DS716+, DS416, DS416play, DS416slim, DS416j, DS216+II, DS216+, DS216, DS216play, DS216j, DS216se, DS116, RS18016xs+
   • 15-Series: RS815RP+, RS815+, RS815, DS2415+, DS1815+, DS1515+, DS1515, DS715, DS415+, DS415play, DS215+, DS215j, DS115, DS115j, RC18015xs+, DS3615xs, DS2015xs
   • 14-Series: RS2414RP+, RS2414+, RS814RP+, RS814+, RS814, RS214, DS414, DS414slim, DS414j, DS214+, DS214, DS214play, DS214se, DS114, RS3614xs+, RS3614xs, RS3614RPxs
   • 13-Series: DS2413+, DS1813+, DS1513+, DS713+, DS213j, RS3413xs+, RS10613xs+
10. For the models below, you can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
    • XS Series: RS3413xs+, RS10613xs+, RS3614xs+, RS3614xs, RS3614RPxs, RC18015xs+, DS3615xs, DS2015xs
    • Plus Series: DS2413+, DS1813+, DS1513+, DS713+, RS2414RP+, RS2414+, RS814RP+, RS814+, DS214+, RS815RP+, RS815+, DS2415+, DS1815+, DS1515+, DS415+, DS215+
    • Value Series: DS114, DS214, DS214play, DS414, RS214, RS814, RS815, DS1515, DS715, DS415play, DS115
    • J Series: DS119j, DS213j, DS214se, DS414j, DS414slim, DS215j, DS115j

DSM

1. USB devices (Wi-Fi dongle, Bluetooth dongle, 3G/4G dongle, USB DAC/speaker, and DTV dongle) are no longer supported. If your Synology NAS is currently connected via a wireless dongle, it will be disconnected after the update.
2. DSM 7.0.1 ends support for ext3. We strongly suggest backing up the data stored on your ext3 volumes and transferring the data to volumes with supported file systems before the update.
3. DSM 7.0.1 by default disables NTLMv1 and enables NTMLv2 only, so SMB clients (e.g., Windows XP devices, media players, network printers, smart TVs, and IP cameras) won’t be able to access your Synology NAS. To restore the connection after the update, go to Control Panel > File Services > SMB > Advanced Settings > Others and enable NTLMv1 authentication.
4. NFSv4.1 and related advanced functions (multipathing) are no longer supported on Synology NAS models with the following package architectures: Alpine, Alpine4k, armada38x, Avoton, Braswell, Bromolow, Cedarview, Grantley, Monaco. If you had previously enabled NFSv4 and NFSv4.1, the maximum NFS protocol is set to NFSv4 by default after the update. For more information about the package architecture of your model, please refer to this article.
5. Creating SSD caches on block-level LUNs is no longer supported. Existing SSD caches for block LUNs will function normally after the update.
6. NT4 domains are no longer supported. Current NT4 domains will be unavailable after the update.
7. The URLs used by DSM when updating or running services have been modified. Please read this article and make sure that your firewall rules are configured appropriately.
8. iSCSI Manager will become SAN Manager. Please refer to package release notes for more details.
9. When you reconnect to iSCSI targets from your VMware ESXi hosts after the DSM update, the datastores on the LUNs that are mapped to the targets may not be mounted properly. This only happens to LUNs created before the update. The resolution can be found in VMware Knowledge Base.
10. To provide comprehensive TLS support and ensure compatibility, the TLS/SSL profile level in Modern compatibility will automatically change to Intermediate Compatibility after the update.
11. EZ-Internet is merged with Router Configuration in Control Panel. To set up port forwarding, go to Control Panel > External Access > Router Configuration.
12. Python3 is merged into DSM as a built-in service. The original Python3 package will be unavailable in Package Center and you can remove it manually.
13. The following DDNS providers are removed from the service provider list at Control Panel > External Access > DDNS:
    ClouDNS, DNO-O-Matic, DNSEXIT, Dynamic DO!.jp, Joker.com, RU-CENTER, TwoDNS.de, Variomedia, Zoneedit.com
14. The updated QuickConnect connection is secured with an SSL certificate, and your QuickConnect domain will be passed to Let's Encrypt for certificate application purposes. Please refer to the Services Data Collection Disclosure for more details.
15. Security Advisor by default enables Login Analysis and certain custom account detection check items after the update.
16. Video conversion to FLV and MPEG-4 Part 2 formats on the following models is no longer supported.
    • 20-Series: DS120j
    • 19-Series: DS119j
    • 16-Series: DS216se
    • 15-Series: DS215j, DS115, DS115j
    • 14-Series: RS814, RS214, DS414, DS414slim, DS414j, DS214+, DS214, DS214se, DS114
    • 13-Series: DS213j

Packages

1. Synology Moments and Photo Station will be upgraded to and merged as Synology Photos. If you would like to use Synology Photos on your mobile devices, please install the iOS/Android app. See this page for more details.
2. Cloud Station Server and Cloud Station ShareSync will be upgraded to and merged with Synology Drive Server. If you are using any Cloud Station Suite applications (Cloud Station Server, Cloud Station Drive, Cloud Station Backup, Cloud Station ShareSync, or DS cloud), you must switch to their counterparts in the Synology Drive Suite to ensure compatibility. See this page for more details.
3. MariaDB 5 is incompatible with DSM 7.0.1. To update to DSM 7.0.1, please install MariaDB 10, migrate the database, and uninstall MariaDB 5 in Package Center first.
4. If you cannot find certain Synology approved third-party packages in Package Center, check this articlefor the latest status of the packages. For other third-party packages, please contact their developers for more information.
5. The following packages are no longer supported:
   Cloud Station Server (replaced by Synology Drive Server), Cloud Station ShareSync (replaced by Synology Drive Server), Discourse, DokuWiki, Drupal, Drupal8, DVBLink, GitLab, GLPI, Hasplm, Java7, Java8, LimeSurvey, Logitech^® Media Server, LXQt, Magento, Magento2, MantisBT, Moments (replaced by Synology Photos), Mono, Moodle, Node.js 0.10, Node.js 0.12, Node.js v4, Node.js v6, Node.js v8, Odoo 8, OpenERP 6.1, OpenERP 7.0, OrangeHRM, Orthanc, osCommerce, osTicket, PHP PEAR, Photo Station (replaced by Synology Photos), phpBB, Piwik, Podcast Generator, PrestaShop, PrestaShop1.7, PythonModule, Redmine, Ruby, Spree, SugarCRM, SVN, Synology File Manager, Tomcat6, Tomcat7, TVMosaic, Webalizer.
6. After you update to Web Station 3.0.0-0308, a web_packages shared folder will be created by default to store files from installed third-party packages (e.g., phpMyAdmin).

What’s New

1. Supports migrating SA3200D system configurations when users perform HDD migration.
2. Added support for memory cache mirroring across controllers for better data consistency on SA3200D.
3. Added support for the "Sync remote mounted folders" option for Shared Folder Sync.
4. Supports creating volumes of up to 1 PB in Btrfs (Peta Volume) format on the XS/XS+, SA (SA3200D excluded), and FS-series models. (Learn more)
5. Added support for data deduplication on Btrfs volumes on certain models. (Learn more)
6. Supports notifying users when there is insufficient storage for metadata.
7. Updated OpenSSL to version 1.1.1l to fix multiple security vulnerabilities (CVE-2021-3711, CVE-2021-3712).

Compatibility & Installation

1. The following drives will be updated automatically to the latest firmware version to fix an unexpected issue that may occur during repair or other read/write operations: HAT5300-4T (firmware version 1401 and 1402), HAT5300-16T (firmware version 1401), HAT5310-8T (firmware version 1401), and HAS5300-16T (firmware version 1401).

Fixed Issues

1. Fixed an issue where DSM might not automatically reconnect to a VPN after disconnection.
2. Fixed the sorting issue on the View Details page in Resource Monitor > Performance > Disks when a USB drive is connected.
3. Fixed an issue where the display in Volume Settings in Storage Manager was incorrect once users pinned the desktop widgets.
4. Fixed an issue where the throughput in Resource Monitor might not be displayed correctly when the system network traffic or the throughput of disks or volumes was heavy.
5. Fixed an issue where when users used third-party extensions to change the DSM theme, they couldn't customize the wallpaper.
6. Fixed an issue where when non-administrator users shared files with password-protected links, the file names were displayed incorrectly.
7. Fixed an issue where a healthy drive might be falsely detected as malfunctioning after it was swapped with a failed drive in the same storage pool when the system was shut down. The issue would cause the degraded storage pool to crash or become missing.
8. Fixed an issue where users couldn't import Docker container configuration files from local computers.
9. Fixed an issue where certain packages couldn't be installed when the built-in "DSM UI Compatible 6.x" package is missing.
10. Fixed an issue where package statuses might be stuck at "Getting Status" in Package Center.
11. Fixed an issue where filters might not work when users edit domain user or group privileges at Control Panel > Application Privileges.
12. Fixed an issue where Security Advisor didn't apply the security baseline settings for the first scan.
13. Fixed an issue where users given the "Local user and management" privilege couldn't perform the assigned actions.
14. Fixed an issue where users who had taken snapshots of a shared folder couldn't disable the usage detail analysis of the shared folder's volume in Storage Manager.
15. Fixed an issue where automatic configuration backup might fail under certain conditions.
16. Fixed a security vulnerability regarding GhostScript used by AirPrint. (CVE-2021-3781).
17. Fixed multiple security vulnerabilities. (Synology-SA-21:25)"

(2021-07-19)

Important notes

DSM 7.0-41890 is updated on July 19 to fix issues with SAN Manager 1.0.1-0197, Active Insight 1.0.2-1007, and SMB Service 4.10.18-0223. Users who have already installed this version of DSM are recommended to update the packages in Package Center.

Before Update

1. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly. If you want to update to the latest version now, please go to Synology Download Center and manually update your DSM.
2. After the installation of DSM 7.0, you will not be able to downgrade to a previous DSM version.
3. Before updating, your Synology NAS should be running DSM 6.2 or above versions.
4. Reserve extra time to complete DSM 7.0 update. The DSM update takes 10 to 20 minutes, while package update may take more than an hour. The actual time depends on the computing power of your model, the number of media indexing files, and the number of packages installed.
5. If you're performing a clean installation, make sure to complete the installation with find.synology.com or Synology Assistant 7.0-50029 or above.
6. To avoid possible compatibility issues, users who installed Active Insight, Synology Photos, and Secure SignIn mobile applications during DSM 7.0 Preview/Beta programs should update the applications to the latest version after the DSM update.
7. DSM 7.0 consumes more system resources, including memory. If your model has less than 1 GB of memory, updating to DSM 7.0 may affect system performance.
8. This version of DSM is compatible with the models below. DSM 7.0 for FS, SA, XS/XS+, and DVA series is currently under development and will be available in the next quarter.
   • 21-series: RS2821RP+, RS2421RP+, RS2421+, RS1221RP+, RS1221+, DS1821+, DS1621+
   • 20-series: RS820RP+, RS820+, DS1520+, DS920+, DS720+, DS620slim, DS420+, DS420j, DS220+, DS220j, DS120j
   • 19-series: RS1219+, RS819, DS2419+II, DS2419+, DS1819+, DS1019+, DS419slim, DS119j
   • 18-series: RS2818RP+, RS2418RP+, RS2418+, RS818RP+, RS818+, DS1618+, DS918+, DS718+, DS418, DS418play, DS418j, DS218+, DS218, DS218play, DS218j, DS118
   • 17-series: RS217, DS1817+, DS1817, DS1517+, DS1517
   • 16-series: RS2416RP+, RS2416+, RS816, DS916+, DS716+II, DS716+, DS416, DS416play, DS416slim, DS416j, DS216+II, DS216+, DS216, DS216play, DS216j, DS216se, DS116
   • 15-series: RS815RP+, RS815+, RS815, DS2415+, DS1815+, DS1515+, DS1515, DS715, DS415+, DS415play, DS215+, DS215j, DS115, DS115j
   • 14-series: RS2414RP+, RS2414+, RS814RP+, RS814+, RS814, RS214, DS414, DS414slim, DS414j, DS214+, DS214, DS214play, DS214se, DS114
   • 13-series: DS2413+, DS1813+, DS1513+, DS713+, DS213j
9. For the models below, you can only download the upgrade patch from Synology Download Center because you won't receive notifications for this update on your DSM.
   • Plus Series: DS214+, DS215+, DS415+, DS713+, DS1513+, DS1515+, DS1813+, DS1815+, DS2413+, DS2415+, RS814RP+, RS814+, RS815RP+, RS815+, RS2414RP+, RS2414+
   • Value Series: DS114, DS115, DS214, DS214play, DS414, DS415play, DS715, DS1515, RS214, RS814, RS815
   • J Series: DS115j, DS119j, DS213j, DS214se, DS215j, DS414j, DS414slim

DSM

1. USB devices (Wi-Fi dongle, Bluetooth dongle, 3G/4G dongle, USB DAC/speaker, and DTV dongle) are no longer supported. If your Synology NAS is currently connected via a wireless dongle, it will be disconnected after the update.
2. DSM 7.0 will end support for ext3. We strongly suggest backing up the data stored on your ext3 volumes and transferring the data to volumes with supported file systems before the update.
3. DSM 7.0 by default disables NTLMv1 and enables NTMLv2 only, so SMB clients (e.g., Windows XP devices, media players, network printers, smart TVs, and IP cameras) won’t be able to access your Synology NAS. To restore the connection after the update, go to Control Panel > File Services > SMB > Advanced Settings > Others and enable NTLMv1 authentication.
4. NFSv4.1 and related advanced functions (multipathing) are no longer supported on Synology NAS models with the following package architectures: Alpine, Alpine4k, armada38x, Avoton, Braswell, Bromolow, Cedarview, Grantley, Monaco. If you had previously enabled NFSv4 and NFSv4.1, the maximum NFS protocol is set to NFSv4 by default after the update. For more information about the package architecture of your model, please refer to this article.
5. Creating SSD caches on block-level LUNs is no longer supported. Existing SSD caches for block LUNs will function normally after the update.
6. NT4 domains are no longer supported. Current NT4 domains will be unavailable after the update.
7. The URLs used by DSM when updating or running services have been modified. Please read this article and make sure that your firewall rules are configured appropriately.
8. iSCSI Manager will become SAN Manager on DSM 7.0. Please refer to package release notes for more details.
9. When you reconnect to iSCSI targets from your VMware ESXi hosts after the DSM update, the datastores on the LUNs that are mapped to the targets may not be mounted properly. This only happens to LUNs created before the update. The resolution can be found in VMware Knowledge Base.
10. To provide comprehensive TLS support and ensure compatibility, the TLS/SSL profile level in Modern compatibility will automatically change to Intermediate Compatibility after the update.
11. EZ-Internet is merged with Router Configuration in Control Panel. To set up port forwarding, go to Control Panel > External Access > Router Configuration.
12. Python3 is merged into DSM as a built-in service. The original Python3 package will be unavailable in Package Center and you can remove it manually.
13. The following DDNS providers are removed from the service provider list at Control Panel > External Access > DDNS:
    CloudNS, DNO-O-Matic, DNSEXIT, Dynamic DO!.jp, Joker.com, RU-CENTER, TwoDNS.de, Variomedia, Zoneedit.com
14. The updated QuickConnect connection is secured with an SSL certificate, and your QuickConnect domain will be passed to Let's Encrypt for certificate application purposes. Please refer to the Privacy Statement for more details.
15. Security Advisor by default enables Login Analysis and certain custom account detection check items after the update.
16. Video conversion to FLV and MPEG-4 Part 2 formats on the following models is no longer supported.
    • 20-series: DS120j
    • 19-series: DS119j
    • 16-series: DS216se
    • 15-series: DS215j, DS115, DS115j
    • 14-series: RS814, RS214, DS414, DS414slim, DS414j, DS214+, DS214, DS214se, DS114
    • 13-series: DS213j
17. Active Insight and Hybrid Share Service are both built-in with DSM 7.0 and are currently in beta. They will be installed along with the update. Packages
18. Synology Moments and Photo Station will be upgraded to and merged as Synology Photos. If you would like to use Synology Photos on your mobile devices, please install the iOS/Android app. See this page for more details.
19. Cloud Station Server and Cloud Station ShareSync will be upgraded to and merged with Synology Drive Server. If you are using any Cloud Station Suite applications (Cloud Station Server, Cloud Station Drive, Cloud Station Backup, Cloud Station ShareSync, or DS cloud), you must switch to their counterparts in the Synology Drive Suite to ensure compatibility. See this page for more details.
20. MariaDB 5 is incompatible with DSM 7.0. To update to DSM 7.0, please install MariaDB 10, migrate the database, and uninstall MariaDB 5 in Package Center first.
21. Migration Assistant is currently in beta on DSM 7.0. More information can be found on the Beta Program page, including compatibility details and release notes.
22. If you cannot find certain Synology approved third-party packages in Package Center, check this article for the latest status of the packages. For other third-party packages, please contact their developers for more information.
23. The following packages are no longer supported:
    Cloud Station Server (replaced by Synology Drive Server), Cloud Station ShareSync (replaced by Synology Drive Server), Discourse, DokuWiki, Drupal, Drupal8, DVBLink, GitLab, GLPI, Hasplm, Java7, Java8, LimeSurvey, Logitech^® Media Server, LXQt, Magento, Magento2, MantisBT, Moments (replaced by Synology Photos), Mono, Moodle, Node.js 0.10, Node.js 0.12, Node.js v4, Node.js v6, Node.js v8, Odoo 8, OpenERP 6.1, OpenERP 7.0, OrangeHRM, Orthanc, osCommerce, osTicket, PHP PEAR, Photo Station (replaced by Synology Photos), phpBB, Piwik, Podcast Generator, PrestaShop, PrestaShop1.7, PythonModule, Redmine, Ruby, Spree, SugarCRM, SVN, Synology File Manager, Tomcat6, Tomcat7, TVMosaic, Webalizer
24. After you update to Web Station 3.0.0-0308, a web_packages shared folder will be created by default to store files from installed third-party packages (e.g., phpMyAdmin).

What’s New

1. Storage
   • A new revision of Storage Manager:
     • Added visuals of Synology NAS models with their drive slots, expansion units, and built-in M.2 slots to help users view drive status.
     • Enhanced usability with a clearer display of the relationship between storage pools, volumes, and SSD caches.
     • Enhanced the setup process of Hot Spare and Data Scrubbing.
     • Added a feature to guide users through configuring newly inserted drives.
   • New features of storage pools, volumes, and drives:
     • Supports performing different tasks on different storage pools simultaneously.
     • Supports updating the firmware for Synology drives.
     • Enhanced the access performance of degraded RAID 6 by 70%.
     • Added display of the storage usage of each category item on Btrfs volumes.
     • Added a new Fast Repair mechanism to reduce the time needed for RAID repair based on storage usage and thus reduce the time of RAID degradation.
     • Added the ability to replace a drive in a healthy storage pool with an unused one without interrupting services or causing storage pool degradation.
     • Added the ability to automatically replace “Critical” or “Failing” drives in protected storage pools with Hot Spare. 　
     • Added the Auto Repair feature to automatically run a RAID repair when a malfunctioned drive is replaced with a healthy one in the same drive slot.
     • Added the ability to eject a storage pool on an expansion unit to ensure the safe removal of drives without interrupting system services.
     • Added the ability to mount storage pools from drives that are inserted after the device has been powered on without interrupting system services.
     • Supports customizing the low capacity notification for individual volumes when their available space drops below the specified value.
     • Added support for space reclamation schedules for Btrfs volumes.
   • New features of SSD Cache:
     • Added the ability to create and remove SSD caches without interrupting system services.
     • Added the new SSD Cache Advisor to monitor I/O accesses and provide more accurate capacity recommendations.
     • Added the ability to pin all Btrfs metadata to SSD caches to enhance the performance of accessing small files and shorten the response time when accessing files regularly.
     • Added the ability to activate automatic protection on SSD read-write caches with multi-drive fault tolerance.
     • Added support for the quick write-back mechanism, delivering a 30% faster synchronization from SSD caches to HDDs when automatic protection is activated.
2. Resource Monitor
   • Revamped the display of recorded performance metrics with a finer granularity of data points and the ability to focus on certain time points.
   • Enhanced monitoring transparency of system services by separating larger, unrelated processes.
   • Added the ability to manage currently accessed files and their connected users to better handle locked files.
3. File System/File Services
   • Supports enabling/disabling file compression for shared folders created on DSM 7.0.
   • Enhanced file compression ratio and added display for the current ratio for each shared folder.
   • Added support for cross-protocol locking between SMB and AFP.
   • Supports accessing encrypted shared folders via NFS on certain models. (Learn more)
   • Enhanced Btrfs performance and lowered I/O latency.
   • Modularized the SMB file service into a package.
   • Allows users to enable/disable SMB transfer logs for permission changes, providing more flexible transfer logs.
   • Enhanced the encryption performance by up to 10% on certain models with the x86 platform.
   • In Windows File Explorer, users can now search for the files and their content in indexed folders.
4. User Management
   • Enhanced the password policy. Passwords must exclude username and description, include both upper-case and lower-case letters as well as numerical digits. The minimum password length is 8 characters.
   • Added the ability to delegate predefined administrator roles to non-administrator user accounts and allow them to manage certain services and system settings, offering more flexible permission management.
   • Added the ability to require imported users to change their passwords after their initial DSM logins.
   • Added the ability to assign user accounts from import lists to specific groups.
5. Domain/LDAP Integration
   • Enhanced LDAP client authentication performance by reducing the number of queries sent with a caching mechanism.
   • The following services and packages now support UPN logins: Synology Assistant, Hyper Backup, Synology Mail Server, Synology Calendar, and Shared Folder Sync.
   • Enhanced domain database synchronization performance by syncing only altered data.
6. Security
   • Added the ability to block USB and console ports.
   • Enhanced QuickConnect connection process to strengthen security.
   • Provides only TLS 1.3 support for the Modern Compatibility option for TLS/SSL profile level.
   • Added the ability to set 2-factor authentication as mandatory for specific users or groups.
7. User Experience
   • Enhanced user experience for DSM first-time installation and Synology Account related service setup (e.g. QuickConnect).
   • Added the ability to automatically install important DSM and package updates.
   • Added information and usage tips about security, notification, and other recommended settings in DSM Help.
   • Added the ability to back up DSM system configuration to a connected Synology Account.
   • Added the ability to export folder permissions reports.
   • Added support for application webhook integration to send system notifications to Synology Chat and other third-party applications.
   • Added severity levels to notifications for better categorization of events.
   • Enhanced user interface responsiveness to launch installed packages and services faster.
   • Enhanced login performance when connecting from external networks.
   • Enhanced user experience for package update processes by displaying the update status with package icons on the DSM desktop.
   • Supports resetting the passwords of all user accounts in the administrators group by pressing the RESET button on Synology NAS for 4 seconds.
   • Revamped the Service tab at Control Panel > Info Center. The tab focuses on the status of enabled services and packages, including local ports, router ports, and firewall permissions.
   • Enhanced Control Panel usability by reorganizing related functionality together:
     • Added a new Synology Account tab to consolidate future services provided through Synology Account.
     • Consolidated Domain/LDAP options to be configured in a new unified wizard.
     • Consolidated QuickConnect settings into the External Access tab.
     • Consolidated User and Groups settings.
     • Consolidated Theme and Application Portal options into Login Portal tab.
     • Consolidated email notification options into Notification > Email tab.
     • Consolidated WS-Discovery into File Services > SMB.
     • Consolidated Network > DSM Settings into Login Portal > Web Services.
     • Relocated the SMB Server Signing option to File Services > SMB > Advanced Settings.
     • Moved Shared Folder Sync into the File Services tab.
     • Moved the Enforce 2-factor authentication option into the Security tab.
     • Modularized DHCP Server into a package.

Fixed Issues

1. Fixed an issue where DSM desktop widgets may disappear after clicking the Show Desktop button.
2. Fixed an issue where, after updating to DSM 7.0-41222, users attempting to sign in to packages through application portals may be stuck on the "Getting Ready" page.
3. Fixed an issue where volume errors might occur when usage detail analysis is enabled in Storage Manager.
4. Fixed an issue where exFAT external storage devices could not mount successfully when the available system memory was fragmented.
5. Fixed an issue where auto poweroff could not be disabled via the HDD Hibernation interface.
6. Fixed an issue where users logging in to some mobile apps causes saved user login sessions to remain even after system reboot.
7. Fixed an issue where certain circumstances might prevent the system from correctly backing up configuration settings.
8. Fixed an issue where Synology Chat Client shows up blank when users sign in.
9. Fixed an issue where DS video can't play videos on certain Samsung TV models.
10. Fixed an issue where UPnP connection via QuickConnect may fail when relay service is not enabled.
11. Fixed an issue where new users could not apply the default wallpaper or images stored in DiskStation as the desktop background.
12. Fixed an issue where Bonjour service generated redundant logs.
13. Fixed an issue where managed servers might become disconnected from the CMS Host if the CMS Host is running DSM 6.2.4.

Limitations

1. When you click Notifications > Show All on your desktop right after the update, you will only be able to see the 500 recent notifications. However, this won't occur for future notifications.
2. DSM 7.0 no longer supports sending push notifications via Synology’s email server. To set up email notifications, go to Control Panel > Notification > Email.
3. DDSM is incompatible with DSM 7.0. To continue using DDSM, you should retain the current DSM version. To update to DSM 7.0, please delete DDSM first.
4. The "Shut down UPS when the system enters Standby Mode" function is only available on Omron UPS.
5. The AFP service is disabled by default after a clean installation.
6. After the update, if your Synology NAS is a managed server in Central Management System, the CMS host must run DSM 6.2.4 or above and CMS 2.1.4 to be able to manage important DSM updates and package updates on your device.
7. Central Management System no longer supports managing Synology NAS with DSM version earlier than DSM 6.2. Please update all managed servers to DSM 6.2 or above first. Managed servers that are unable to update to DSM 6.2 should be disjoined from the CMS host before the update.

(2024-12-03)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. This update will restart the device.
3. To enhance product security, the following packages will require a manual update after this release. Please go to the Package Center and click Repair to install the latest versions:
   • Synology Drive Server 3.0.4-12699
     • Note: After repairing Synology Drive Server, Synology Office will not auto-enable. Please go to Package Center > Synology Office and click Run.
   • Replication Service 1.0.12-0066

Fixed Issues

1. Fixed multiple security vulnerabilities (Synology-SA-24:02).
2. Fixed multiple security vulnerabilities (Synology-SA-24:01).
3. Fixed multiple security vulnerabilities (Synology-SA-23:05).
4. Fixed security vulnerabilities regarding netatalk (CVE-2024-38439, CVE-2024-38440, CVE-2024-38441).
5. Fixed a security vulnerability regarding Terrapin Attack (CVE-2023-48795).
6. Fixed a security vulnerability (Synology-SA-24:20).

(2023-05-02)

Important notes

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to update it manually.
   • Your DSM is working fine without having to update. The system evaluates service statuses and system settings to determine whether it needs to update to this version.
2. Depending on your Synology NAS model, this update will restart the device.
3. AAC-encoded content can be decoded and natively played back by most end devices, such as smartphones, tablets, computers, and smart TVs. Server-side transcoding of AAC-encoded content has been a redundant and resource-consuming process that was removed in DSM 6 starting from this version.
4. For the following packages to be available after this update, users must go to the Package Center and click Repair to install the latest version:
   • Advanced Media Extension 1.0.2-0039
   • Audio Station 6.5.7-3383
   • Media Server 1.8.5-2902
   • Video Station 2.5.1-1668
5. Moments and Photo Station will resume working once Advanced Media Extension is updated to the latest version.

Compatibility & Installation

1. The following drives will be updated automatically to the latest firmware version to fix an unexpected issue that may occur during repair or other read/write operations: HAT5300-4T (firmware version 1401 and 1402), HAT5300-16T (firmware version 1401), HAT5310-8T (firmware version 1401), and HAS5300-16T (firmware version 1401).

What’s New

1. When users select Outlook as the system notification service provider, they will need to sign in with OAuth 2.0, which is a safer authentication method. Previously configured Outlook accounts will be migrated to "Custom SMTP server". We strongly recommend re-configuring the settings for authentication to ensure your Outlook account security.

Fixed Issues

1. Fixed an issue where files shared via SMB may not be discoverable through macOS Ventura's Spotlight search.
2. Fixed an issue where files shared via AFP may not be discoverable through macOS Ventura's Spotlight search.
3. Fixed an issue where a Synology NAS running DSM 7.2 may be unable to update its domain database after syncing data from a domain controller running DSM 6.2.4.
4. Fixed a security vulnerability (Synology-SA-22:23).

(2022-05-24)

Important Note

1. The update is expected to be available in all regions shortly, while the time of release in each region vary slightly. If you want to update your DSM to this version now, please click here.
2. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.

Fixed Issues

1. Fixed multiple security vulnerabilities regarding Netatalk (Synology-SA-22:06).

(2022-02-22)

Important Note

1. The update is expected to be available in all regions shortly, while the time of release in each region vary slightly. If you want to update your DSM to this version now, please click here.
2. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.

Fixed Issues

1. Fixed an issue where users couldn’t add Google or Outlook accounts at Personal > Email Delivery.
2. Fixed an issue where sending a test email would fail if users selected Outlook as the service provider.
3. Fixed multiple security vulnerabilities. (Synology-SA-22:03)
4. Fixed an issue where filters might not work when users edit domain user or group privileges at Control Panel > Application Privileges.
5. Fixed an issue where Avid Pro Tools couldn't save files via SMB.

(2022-01-27)

Important Note

1. The update is expected to be available in all regions shortly, while the time of release in each region vary slightly. If you want to update your DSM to this version now, please click here.
2. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.

Fixed Issues

1. Fixed a security vulnerability regarding Samba (Synology-SA-22:02).

(2022-01-11)

Important Note

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 6.2.4 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Fixed Issues

1. Fixed an issue where package logs weren't rotated after a switchover was performed on SA3200D.
2. Fixed an issue where Synology Account might be signed out unexpectedly.
3. Updated the renewal rule of the built-in certificate to prevent DSM connection errors.
4. Fixed an issue where users couldn't expand a RAID 1 storage pool on the active server in a Synology High Availability cluster when the active server's RAID 1 storage pool is smaller than the one on the passive server.
5. Fixed multiple security vulnerabilities. (Synology-SA-22:01)

(2021-09-01)

Important Note

1. DSM 6.2.4-25556-2 is updated on September 1 to fix the issues below.
   • Fixed an issue where the Synology Account sign-in status at Control Panel > QuickConnect was incorrectly shown as not signed in.
   • Fixed an issue where exFAT Access package installation might fail.
   • Fixed an issue where users couldn't use SSH transfer encryption for Shared Folder Sync tasks.
   • Fixed an issue where Active Insight might not be able to automatically collect and transfer diagnostic data when users submitted technical support forms.
2. Disables the "Shut down UPS when the system enters Safe Mode" option by default.
3. Audio Station must be updated to version 6.5.6-3377 or above to be compatible with this update.
4. Media Server must be updated to version 1.8.1-2876 or above to be compatible with this update.
5. Surveillance Station must be updated to version 8.2.9-6459 or above to be compatible with this update.
6. Virtual Machine Manager must be updated to version 2.4.1-9259.

What's New

1. Added support for Synology Active Insight, which provides an option for automatic delivery of diagnostic data to Synology Technical Support upon submission of a support ticket for a faster troubleshooting process. This option is configurable at DSM > Support Center.
2. Added log entries for drive removal.

Fixed Issues

1. Fixed an issue where the domain group list wasn't updated correctly.
2. Fixed an issue where administrator users couldn't sign in to DSM after they reset their password by pressing the RESET button.
3. Fixed an issue where all input fields across DSM were auto-filled with DSM account name if users had had Google Chrome remember their password with the Autofill function.
4. Fixed an issue where Finder might stop responding when users search for content within mounted folders on macOS Big Sur 11.1 and 11.2.
5. Fixed an issue where after users updated to DSM 6.2.4, iSCSI targets mapped with LUNs created on DSM 6.0 and before became offline and couldn't be enabled.
6. Fixed an issue where signing in via 2-step verification generated an extra log entry.
7. Fixed an issue where deleted files from the home folder couldn't be found in the recycle bin if deleted via SMB.
8. Fixed an issue where there is a slight possibility that the SMB service might be shortly disconnected the moment users apply SMB setting modifications.
9. Fixed an issue where backing up data on Windows using Windows Server Backup or other third-party software to Synology NAS might fail after users updated their Windows with updates released since April 2021.
10. Updated the OpenSSL setting in response to new rules of Let's Encrypt certificates.
11. Fixed an issue where there might be an incorrect IP conflict message for VLANs.
12. Fixed an issue where DHCP settings of one network interface might be wrongly applied to another interface whose DHCP settings hadn't been enabled.
13. Fixed an issue where CMS-managed servers might disconnect from a CMS Host that has been updated to DSM 6.2.4.
14. Adjusted the LED indicator behavior for drive hibernation and deep sleep, making the LED status easier to distinguish on the following 15-series and 16-series models: DS916+, DS716+II, DS716+, DS416, DS416play, DS415+, DS415play, DS216+II, DS216+.
15. Fixed an issue where the UPS server might not function properly after the system reboot.
16. Refines the description for abnormal S.M.A.R.T test results and specifies the problematic S.M.A.R.T attributes.
17. Fixed an issue where the system might not obtain the compatibility information of hot-swapped drives on expansion units.
18. Fixed an issue where Western Digital hard drives couldn't be detected upon bootup on the following models: RS4017xs+, RS3618xs, RS3617xs+, RS3617RPxs, DS3617xsII, DS3617xs.
19. Fixed an issue where the fan couldn't resume in full speed mode after a system reboot on models with the V1000 platform.
20. Fixed an issue where memory module error messages weren't displayed properly.
21. Enhanced the system performance when there is a large number of concurrent connections.
22. Fixed an issue where when the "Get user/group lists with NT4-compatible mode" option is enabled, domain users might not be able to sign in to Synology Contacts.
23. Fixed an issue where 15-series and newer models couldn't hibernate when there is a system error, such as a storage issue and hardware malfunction.
24. Adjusted the fan speed on SA3400 and SA3600 to fix a potential overheating issue when E10G18-T2 is installed.
25. Fixed an issue where users couldn't expand the LUNs on ext4 volumes that are already mapped to iSCSI Targets.
26. Adjusted the fan speed to fix a potential overheating issue when a Synology network interface card (E10G18-T1, E10G18-T2, E10M20-T1, E10G21-F2, E25G20-F2) is used as the Heartbeat connection in an SHA cluster or for Open vSwitch.
27. Fixed an issue where the system couldn't retrieve the full name of domain groups correctly after users click "Update domain data".
28. Fixed an issue where the status of domain users couldn't be displayed properly when the status is "lockout".
29. Fixed multiple security vulnerabilities regarding Samba (CVE-2020-14318, CVE-2020-14323, CVE-2020-14383, CVE-2020-27840, CVE-2021-20277).
30. Fixed multiple security vulnerabilities. (Synology-SA-21:22)

(2023-05-04)

Important Note

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update includes fixes to the below issues mentioned in 6.2.4-25554.
   • Fixed an issue where external hard drives couldn't wake from hibernation on certain platforms (Grantley, Broadwell, Broadwellnk, Purley).
   • Fixed an issue where users could not sign in to Synology mobile apps after they had cleared the remembered device list in DSM 6.2.4.
3. This update will restart your Synology NAS.
4. Integrates the beep control options for degraded/crashed volumes and abnormal SSD caches.
5. The new LED indicator behavior makes the system status easier to distinguish on 15-series and newer models. (Learn more)
6. DNS Server must be updated to version 2.2.3-5028 or above to be compatible with this update.
7. LDAP Server must be updated to version 2.4.49-2515 or above to be compatible with this update.

Compatibility & Installation

1. Enhanced the password policy. Passwords must exclude usernames and descriptions, include both upper-case and lower-case letters as well as numerical digits. The minimum password length is 8 characters.
2. Fixed a compatibility issue between the Geminilake platform and virtual machines running Windows 10.
3. On a newly installed version of DSM, file rename and deletion log events for SMB will be enabled by default.

What's New

1. Users can now set 10 email addresses to receive system notifications.
2. Enhanced domain database synchronization performance by syncing only altered data.
3. Supports bad block detection on Synology SSDs.
4. Supports the updating of Synology HDD and SSD firmware directly via DSM.
5. Improved fan speed control based on the Synology network interface card temperature for 19-series and newer models.

Fixed Issues

1. Fixed an issue where the "Enable Web Assistant" option didn't work on NVR216 and NVR1218.
2. Fixed an issue where the date and time formats for scheduled tasks were inconsistent in the widget and system settings.
3. Fixed an issue where scheduled tasks may fail to be executed or modified.
4. Fixed an issue where tasks scheduled at a high frequency generated a lot of logs and occupied system partitions.
5. Fixed an issue where the custom welcome text may differ on the preview and actual login page due to character limits.
6. Fixed an issue where data could still be written to LUNs after the volume runs out of space.
7. Fixed an issue where if Wi-Fi dongles are installed, some available network interfaces weren't listed when users edit iSCSI targets.
8. Fixed an issue where iSCSI services may be unstable when the host is too busy or when users disable iSCSI targets and ending sessions simultaneously.
9. Fixed an issue where initiators couldn't connect to the iSCSI target after ethernet interfaces reconnect in a high-availability cluster.
10. Fixed an issue where packages may not operate properly when drives migrated from another Synology NAS cause volume ID conflicts.
11. Fixed an issue where users may not be able to find their Synology NAS in My Network Places on Windows when WS-Discovery isn't operating properly.
12. Fixed an issue where Log Center didn't record recycle bin enabling/disabling events.
13. Fixed a security vulnerability regarding Sudo. (Synology-SA-21:02)
14. Fixed multiple security vulnerabilities. (Synology-SA-21:03)

Limitations

1. In response to the enhancement of domain database synchronization efficiency, the domain user/group list will be updated once an hour when it is created with Synology Directory Server.

(2021-02-23)

Important Note

1. This update is recalled on March 8, 2021, because of an issue where external hard drives couldn't wake from hibernation on certain platforms (Grantley, Broadwell, Broadwellnk, Purley). The issue is fixed in version 6.2.4-25556.

(2020-12-16)

Important Note

1. Your Synology NAS may not notify you of this DSM update because of the following reasons. If you want to update your DSM to this version now, please click here to manually update it. Only Synology NAS with DSM 6.2.3 installed can be updated to this version.
   • The update is not available in your region yet. The update is expected to be available for all regions within the next few days, although the time of release in each region may vary slightly.
2. This update will restart your Synology NAS.

Compatibility & Installation

1. Photo Station must be updated to version 6.8.14-3501 or above to be compatible with this update.

What's New

1. Enhanced NFSv4 connection stability.
2. Increased the maximum number of IP camera channels on FS6400 to 150.

Fixed Issues

1. Fixed an issue where support ticket submissions might fail in a certain version of Google Chrome.
2. Fixed an issue where Windows 10, version 2004 virtual machines might fail to power on when users select UEFI as the firmware.
3. Fixed an issue where there might be network disconnections on Virtual DSM.
4. Enhanced the stability of SSD caches when multiple processes are accessing the same cache at the same time.
5. Fixed an issue where CMS managed servers might not connect to the CMS host after they restarted.
6. Fixed an issue where disks in Resource Monitor performance charts were not displayed in the correct sequence. Affected models include:
   • 21-series: DS1621+
   • 20-series: FS6400, DS1520+, DS920+, DS720+, DS420+, DS220+
7. Fixed an issue where when users access files on DSM using Windows software via SMB, system performance might be affected. This is because of Windows software's continuous attempts to access the shared folders to which it has no permissions.
8. Fixed an issue where Windows File Explorer might not update file deletion or removal in real time when folders are mounted via SMB.
9. Fixed an issue where the system might not report the power status correctly on SA3200D.
10. Fixed an issue where the setting pages after first-time DSM installation might not launch on Synology NAS models with multiple LAN ports.
11. Fixed an issue where users were not able to empty the recycle bin of the "usbshare" shared folder.
12. Fixed an issue where administrators were not able to change the "User must change password at next logon" setting via Windows RSAT.
13. Fixed an issue where domain users could not be added to built-in groups via Windows RSAT.
14. Fixed an issue where enabling the "Collect debug logs" option for SMB might result in excessive system space usage.
15. Fixed an issue where the system might send incorrect port forwarding notifications after a restart.
16. Fixed an issue where SHA-1 certificates might disappear when users click "Upgrade certificate".
17. Fixed an issue where DSM might block users' IP addresses and create excessive logs when they tried to sign in after re-installing DSM.
18. Fixed an issue where incorrect drive compatibility information was displayed after drive migration.
19. Enhanced the stability of network interface cards on certain models.
20. Fixed an issue where links in password reset emails did not work when the URLs exceed the maximum length.
21. Fixed an issue where packages did not update automatically due to dependency problems.
22. Enhanced SAS controller stability during system shutdowns.
23. Fixed multiple security vulnerabilities. (Synology-SA-20:26)
24. Supports Let's Encrypt ISRG certificates.

(2020-11-19)

Important Note

1. The update is expected to be available for all regions within the next few weeks, although the time of release in each region may vary slightly. If you want to update to the latest version now, please go to Download Center and manually update your DSM.
2. This update includes fixes to the below issues mentioned in 6.2.3-25423.
   • Fixed the issue where the automatic mounting of encrypted shared folders might result in the loss of indexing rules and the failure of the search function.
   • Fixed the issue where the Synology NAS equipped with NVMe device might be woken up from hibernation by the update of NVMe device's health status cache.
3. This update will restart your Synology NAS.
4. Removed the support for Google Cloud Print in DSM 6.2.3 and above.
5. To avoid the interruption of iSCSI service, the automatic DSM update and your power schedule to shut down may not be executed as expected if there are any active iSCSI sessions.
6. Removed TWNIC from the list of DDNS service providers on DSM 6.2.3 since TWNIC will stop accepting new registrations for DSM as of Jul. 1, 2020. Your current TWNIC DDNS services can still be used and edited but will not be available again once deleted from DSM.
7. This is the last major DSM version (6.2) that supports the video conversion to .flv and MPEG-4 Part 2 on certain models (RS814, RS214, DS414, DS414slim, DS414j, DS216se, DS215j, DS214+, DS214, DS214se, DS213j, DS120j, DS119j, DS115, DS115j, and DS114) in consideration of the termination of Adobe's support for Flash Player by the end of 2020.

What's New in DSM 6.2.3

1. Thin Provisioning LUN will become protected upon insufficient volume space, preventing clients from writing data to the LUN while allowing read-only access to the existing data.
2. Added support for domain users to sign in to DSM using a UPN (user principal name) via file protocols (including SMB, AFP, FTP, and WebDAV).
3. Added support for the option of forcing password changes for importing local users.
4. Enhanced the compatibility of the imported user list, providing clearer error messages when the imported file contains syntax errors.
5. Added support to record only the events of SMB transfer selected by the user, providing transfer logs that meet the requirements more closely.
6. Added support for client users to monitor the changes of subdirectories under shared folders via SMB protocol.
7. Added details of desktop notifications to facilitate users' timely responses.
8. Added support for external UDF file system devices.
9. Added support for the Open vSwitch option in a high-availability cluster.
10. Added support for IP conflict detection, providing logs and notifications accordingly.
11. Added support for Let's Encrypt wildcard certificates for Synology DDNS.
12. Added support to waive the need of DSM login again through an HTTPS connection after a change in client's IP address.
13. Added support for hardware-assisted locking for Thick Provisioning LUN on an ext4 volume.
14. Added support for customized footer message on DSM login pages.

Fixed Issues

1. Fixed the issue where certain cities might be mapped to incorrect time zones.
2. Fixed the issue where LDAP users could not be notified of the upcoming password expiration.
3. Fixed the issue where the upload of LDAP certificate could not overwrite the original one with the same file name.
4. Fixed the issue where the application permissions settings might not be applied properly to the Domain Users group when such group in Windows AD domain was named other than "Domain Users".
5. Fixed the issue of inaccurate time of usage history in Resource Monitor.
6. Improved system responsiveness by reducing the latency of the Btrfs file system in certain scenarios.
7. Fixed the issue where SNMP did not provide the indices of Disk and RAID correctly.
8. Fixed the issue where the recycle bin of an encrypted shared folder might not be emptied properly.
9. Enhanced the DSM login performance for multiple concurrent logins.
10. Adjusted the personal notification mechanism to comply with the latest Gmail API.
11. Fixed the issue where the iSCSI service might be interrupted when the LUN backup task is stopped.
12. Removed the function of expanding the capacity of a block LUN.
13. Fixed security vulnerabilities (Synology-SA-19:33, Synology-SA-19:35, Synology-SA-19:37, Synology-SA-20:06, Synology-SA-20:18).

Known Issues & Limitations

1. Due to Apple's new security requirements for trusted certificates, after a DSM update from an older version, the access to DSM via HTTPS using Google Chrome on a client device running macOS 10.15 might fail because of a certificate error. You may renew the default certificate on the Synology NAS to resolve this issue.
2. To run Centralized Management System (CMS) on Surveillance Station after updating to DSM 6.2.3-25426, Surveillance Station 8.2.7 or above is required.

(2020/11/19)

1. N/A. (This is the initial release of DS1821+)