For some users Microsoft Connectivity Analyser is trowing error :
Attempting the FolderSync command on the Exchange ActiveSync session.
The test of the FolderSync command failed.Tell me more about this issue and how to resolve it
Additional Details
Exchange ActiveSync returned an HTTP 500 response (Internal Server Error). HTTP
Error : [System.Net.WebException]: Der Remoteserver hat einen Fehler zurückgegeben: (500)
Interner Serverfehler.
Für den Benutzergerätecontainer ‘CN=ExchangeActiveSyncDevices,CN=username,OU=Users,OU=OU1,OU=User,DC=domain,DC=com’ in Active Directory konnten keine Sicherheitseinstellungen übernommen werden. Löschen Sie den Container, sofern dieser leer ist.”
in English
Exception message: Security settings couldn’t be applied to the user device container ‘CN=ExchangeActiveSyncDevices,CN=username,OU=Users,OU=OU1,OU=User,DC=domain,DC=com’ in Active Directory. Delete the container if it’s empty.
The Solution was to delete the CN=ExchangeActiveSyncDevices from ADSI.edit for the affected user.