On one of our Unity servers, Example Administrator's exchange mailbox was not migrated when the exchange mailstores were migrated to another server. The old mailbox is gone. The Example Administrator subscriber is still intact in SAWeb but it was pointing to the wrong server for the exchange attributes. I have added the mailbox back but the exchange attribute continues to point to the new server. How do I make Example Administrator point to the new server and message store?
Try running Message Store Configuration Wizard from Add/Remove Programs, it should fix the issue.
I always recommend doing it off-business hours to minimize the impact.
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