Yesterday we had an issue where everyones Outlook was freezing and becoming non responsive. While looking at the server I noticed that the RPCServe.exe*32 was using a constant 13% cpu. I ran the performance monitor and noticed that the RPC Requests Outstanding was in the high 80% range. I ran the performance tool from exchange but all it told me is that MAPI and RPC was high by more than one user and it only listed one user. When we told him to log off of outlook the high RPC still remained. I tried stopping our BES server and our mailbox journaling but it didn't seem to help.
We eventually rebooted the server and all seems better. But what concerns me is that i dont know why and i still notice that the RPCServ.exe*32 is still running at 13% cpu, although no slowdowns in outlook.
I'm wondering if anyone else has seen this or has any way for me to determine what i can do if it happens again?