I upgraded from RTM to SP1 using the instructions provided on this blog and on the MSDN pages. Now, the RpcClientAccess.Service.exe keeps crashing and throwing exceptions in the event viewer. I think this error may be related to the BES Express 5.0.2 server on the same box. Can anyone offer a solution?
System Log
The Microsoft Exchange RPC Client Access service terminated unexpectedly. It has done this 1 time(s). The following corrective action will be taken in 5000 milliseconds: Restart the service.
Application Log
Application popup: Visual Studio Just-In-Time Debugger : An unhandled exception ('CrashNowException') occurred in Microsoft.Exchange.RpcClientAccess.Service.exe [11072].
Watson Report
<watson-report event-type="E12" issue-type="4" timestamp="2010-09-11 20:34:17Z" reporting-enabled="0" xml:space="preserve">
<details>InvalidOperationException (Nullable object must have a value.) in Microsoft.Exchange.RpcClientAccess.Handler.RopHandler.Logon</details>