I am having the stangest problem with OMA.
This is a server running SBS 2003 with all the latest patches.
All users working perfectly bar one.
If I delete the account and recreate it it will work fine for a while but then goes again with the below error.
Event Type: Error
Event Source: MSExchangeOMA
Event Category: (1000)
Event ID: 1805
Request from user firstname.lastname@example.org resulted in the Microsoft(R) Exchange back-end server xxx returning an HTTP error with status code 403
Date: Wed, 14 Nov 2007 15:14:29 GMT
.For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp
What I suspect is happening is the Windows Mobile device is synching backup to an old exchange profile and causing the problem.
What could also be causing problems is this user has 2 devices connecting to his OMA and has a shared calander and contacts that are shared out among 5 people internaly.
Anybody seen anything like this before??