I have 3 servers using windows server 2003, and running Exchange Server 2003 setup, 2 backends and one front-end. i looked at the log of the Front-end server and i'm getting this error every 3 minutes. Just for this one user.
Event Type: Error
Event Source: Server ActiveSync
Event Category: None
Event ID: 3005
Time: 8:55:02 AM
Computer: Front-END Server
Unexpected Exchange mailbox Server error: Server: [backend.Domain.com] User: [Nate@stratisinc.com] HTTP status code: . Verify that the Exchange mailbox Server is working correctly.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp
i tried to log into https://server.domain.com/oma i get prompt for user and password then i get my inbox folder list,calendar etc... so OMA is working fine.