3 users in our orgnanization are experiencing lagging and freezing when trying to search a mailbox that they all have Full control and Send As permissions to. They can search their own mailboxes without issue. Outlook will eventually return some results; but the user cannot click anything else within the app or it'll completely crash.
There are no issues with any other shared mailboxes in our organization. What do I need to do short of re-creating the shared mailbox account?
We have a Windows Server 2008 R2 level AD and Exchange 2010 Server.