We run Exchange 2010 SP3 on prem (with Outlook 2010 and 2013), we have started experiencing auto mapping problems since we applied Rollup 6. It is affecting an increasing number of clients as well.
The main issue is that some users who had previous access to Shared Mailboxes working just fine have now "lost" access to the shared account folders. Outlook simply displays the client's personal folder structure instead of the folders belonging to the Shared mailbox. Properties of the Shared account Inbox actually point to the person's email address, not the shared mailbox one.
All attempts at remedying the situation failed, including recreating the profile, setting up on a new computer, cache vs non-cache mode. Even giving access to the Sahred mailbox to a new user will result with the same problem. The auto mapping attributes (msExchDelegateListLink and msExchDelegateListBL) check out fine as well. At a loss with this one. Note that the shared accounts are fine, accessing them via OWA for instance works just fine.
Finally, I noticed that auto mapping for our Outlook 2013 clients has stopped working altogether. Can this be related?
Help!