This article shows you how to sync Synology Calendar with Mozilla Thunderbird, Microsoft Outlook, and CalDAV clients on Android, iOS, and macOS.

Before you start

Check port status

Make sure the following ports used by Synology Calendar are open:

• HTTP: 5000
• HTTPS: 5001

Find CalDAV URL

1. Launch Synology Calendar.
2. On the right panel, hover over the calendar you want to sync with your CalDAV client and click the down icon. Select CalDAV Account.
3. Copy the CalDAV URL used for syncing Calendar to your macOS, iOS^{1 2 3}, or Thunderbird⁴.

Sync to Android

1. Install DAVx5 from Google Play (a purchase may be necessary).
2. Open DAVx5 and select Login with URL and user name.
3. Paste the URL copied from Synology Calendar into the Base URL field and enter your User name and Password.
4. Open the newly added account and tap the CALDAV tab. Select the calendars you want to sync.
5. You can now view all your calendars and events from Synology Calendar in Google Calendar on your Android device. All changes will be synced to Synology Calendar.

Sync to iOS

1. On your iOS device, go to Settings > Calendar > Account > Add Account.
2. Tap Other.
3. Tap Add CalDAV Account.
4. Enter the following information and tap Next:
   • Server: Paste the URL copied from Synology Calendar.³
   • User Name and Password: Enter your DSM credentials.⁶
   • Description: Customize the calendar display name.
5. Select Calendars or Reminders to sync.
6. Tap Save.
7. You can now view all your calendars and events from Synology Calendar on your iOS device. All changes will be synced to Synology Calendar.

Sync to macOS

1. Launch Calendar on your Mac and select Add Account… from the Calendar menu.
2. Select Other CalDAV Account… and click Continue.
3. Select Advanced from the Account Type menu.
4. Enter your DSM username, password, server address, server path, and port number. Click Sign In.^{2 3 5 6}
5. Select Calendars from the Use With menu.⁷
6. You can now view all your calendars and events from Synology Calendar on your Mac. All changes will be synced to Synology Calendar.

Sync with Thunderbird (Windows and macOS)

1. Launch Calendar in Thunderbird, right-click on the left sidebar, and then select New Calendar.
2. Select On the Network to access Synology Calendar and click Continue.
3. Paste the URL copied from Synology Calendar into the Location field.
4. Click Find Calendars.⁸
5. Select the calendars you want to sync with Thunderbird, and click Subscribe.
6. You can now view all your calendar and events.

Sync with Outlook (Windows)

1. Install the free plug-in, Outlook CalDav Synchronizer. The CalDAV Synchronizer tab will be added to your Outlook.
2. Click CalDAV Synchronizer > Synchronization Profiles.
3. Add a new profile and set the profile type to Generic CalDAV/CardDAV.
4. Select Calendar as the Outlook folder, paste the URL copied from Synology Calendar, and enter your credentials.⁹
5. Click Test or discover settings and select the calendar you want to sync.
6. The required fields are automatically filled in upon selecting the calendar. Make sure to update your email address.
7. Click OK.