The following errors may appear in agent log files:
22.03.2012 12:21:52 CMessages::GetBySubject Error 777 2010. InStr( Subject ,MsgSubject) (Folder: 'Kalender', SourceKey: '5A9AFBE130C85B40AFD05EC2A780176A00000992B795')
These errors are informational and do not affect the agent’s ability to synchronize messages.
The next update of Migration Manager for Exchange will correct this behavior.