When a user (including me) clicks the to box on a new email outlook hangs for about a min then brings up the Select Names dialog. When you perform a search the "New Mail" dialog along with the Select Names hangs, but not outlook main.
A message pops up from the task bar that outlook is trying to retrieve data from the exchange server. Screen shot here
After several minuts an error box appears "The search cannont be completed. The operation failed." Screen shot here
I've tried rebooting the Domain Controllers and the Exchange CAS and Mail store servers, but that didn't change anything.
Also the domain is a 2008 R2 functional level.
Thank you for your time,