What are all the settings on an iPhone that can affect the use of Exchange ActiveSync? I had been using this phone fine for ActiveSync against Exchange 2003 SP2, but one day recently the phone locked up on me and I had to restore it, which I did. I also reconfigured its Exchange account. I can still sync up to Exchange, but Exchange is recording thousands of errors in Windows Server's application log. It never did this before except on the rare occasion of an actual problem, which there isn't now--syncing works. Nothing has changed on the server in this short amount of time, and I've verified with an outside site used for testing your Exchange ActiveSync setup, that no errors are triggered with it. Something is different about the phone. Unfortunately, the error is something of a generic one, and it can mean any number of things. Event Type: Error Event Source: Server ActiveSync Event Category: None Event ID: 3005 Date: 4/20/2010 Time: 4:12:40 PM User: ... Computer: ... Description: Unexpected Exchange mailbox Server error: Server: http://... User: http://... HTTP status code: 500. Verify that the Exchange mailbox Server is working correctly.
