I have ran the exchange optizmier today and have found the folllwing errors on our SBS 2008 box:
Since the RPC operations per second per user is greater than 0.35, the RPC operations per second rates indicate a user or users on this server are unusually active. The measured RPC operations per second per user rate is 2.348
The server is exhibiting a processor bottleneck.
'System\Context Switches/sec' is 22763.96, which is higher than the error threshold of 20000.
We have approx 15 mailboxes, where we have people connected via Outlook 2003 in non-Cached Mode (does this make a difference?). Also approx 8 people connected via iphones, ipads, etc.
Anyone helps on the matter would be appreciated.