Exchange 2010 users getting long delays with outlook
Recently with no changes whatsoever Outlook has started to be very unreliable with constant "retreiving information" notifications and hanging. clicking on folders under inbox can take anything from instant to 30 seconds.
Doing performance troubleshooting tests on both the CAS and mailbox servers produce a few warnings which may or may not be a fault
The top 6 users account for 100% of the MAPI CPU usage on the server.
A potential issue with the RPC activity for some MAPI operations was identified.
Not certain what either means and not been able to find any specifics so far. any possible ideas on what causes this to start to happen?