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Category: Exchange

Active Sync Error EventID 3005 Unexpected Exchange Mailbox Server Error

One of our customers was getting the below error and it took ages to find a solution so I thought I would post it here.

[crayon]Unexpected Exchange mailbox Server error: Server: [server.domain] User: [useremail] HTTP status code: [503]. Verify that the Exchange mailbox Server is working correctly.

For more information, see Help and Support Center at[/crayon]