Public folder "{0}" could not be mail-enabled. The error is as follows: "{1}". This may indicate that mail public folder ...

Public folder "{0}" could not be mail-enabled. The error is as follows: "{1}". This may indicate that mail public folder objects in Exchange Online are out of sync with your Exchange deployment. You may need to rerun the script Sync-MailPublicFolders.ps1 on your source Exchange server to update mail-enabled public folder objects in Exchange Online Active Directory.