Database '{0}' encountered an unknown error when reading its configuration from Active Directory. There appears to be an ...

Database '{0}' encountered an unknown error when reading its configuration from Active Directory. There appears to be an invalid database copy configured on server '{1}'. Either this database copy is not properly configured, or its configuration has become corrupted in Active Directory. If the Get-MailboxDatabaseCopyStatus cmdlet does not show this database copy as healthy, you may need to re-create this database copy.