Our mobile users randomly lose access to their exchange mailboxes. The fix for this is to restart IIS. I am not sure what the problem may be. Here are some of the errors that I am seeing in the logs. This happens at least a few times a week. Any help in tracking down the root issue and applying a permanent fix would be amazing!
An error occurred on the socket that is used to process AUTD notifications. The error code is . As a result, AUTD has been uninitialized, but it will be reinitialized upon receipt of the next Ping request. If you continue to see this message, restart IIS.
Unexpected Exchange mailbox Server error: Server: [exchange03.wathen-castanos.com] User: [email@example.com] HTTP status code: . Verify that the Exchange mailbox Server is working correctly.