This morning, a user logged on, opened up Outlook and low and behold, 2000 email items with an UNREAD status. Also, found out, another user has the same problem. What could cause this? The only thing I can think of that potentially causes this is a mailbox/database restore or migration. Mailbox migration completed over a month ago and checked with our backup admin and no Exchange restores have been done as of late.
Here's a brief description of our Exchange architecture:
- Windows 2012 R2 AD domain
- 8 sites
- Exchange 2007/2013 coexistence
- Exchange 2013 DAG extended to two sites: LA, MKE.
- All Exchange info (mailboxes, public folders) migrated to Exchange 2013 DAG
- Near decommissioning Exchange 2007 boxes.
- Users in question plagued with UNREAD email items one in LA and other in MKE. Occurrence for LA site user once and MKE user is frequent.
Thoughts????