Desktop Sync cannot register, subscribe or synchronize with the repository - Desktop Sync cannot register, subscribe or synchronize with the repository - Alfresco - Alfresco Sync Service - Alfresco/Alfresco-Sync-Service/3.0/Alfresco-Sync-Service/Alfresco-Sync-Service/Administer/Troubleshoot-Sync-Service/Desktop-Sync-cannot-register-subscribe-or-synchronize-with-the-repository - 3.0

Try the following:

• Check that the repository is up.
• Check the repository log for exceptions.
• Make sure that the Sync Service amp has been applied to the repository.
• Check that the Sync Service is up.
• Check the Sync Service logs for exceptions.