Unexpected Exchange mailbox Server error: Server: [EXCHANGE.yourdomain.local] User: [firstname.lastname@example.org] HTTP status code: . Verify that the Exchange mailbox Server is working correctly.
We got this message the first time any user connected to their mailbox using ActiveSync (e.g. with a Treo, etc.), however no problems were reported by the user and no further errors were logged.
If you don't see this error more than once and ActiveSync works then you should be able to ignore this event.