After doing an Upgrade of Exchange 2010 SP2 to SP3 the RpcProxy/ Outlook Anywhere stopped working.
Eventlog on Exchange server showed lots of:
Event ID 1310
Application information:
Application domain: /LM/W3SVC/1/ROOT/Rpc-18-130144692505559065
Trust level: Full
Application Virtual Path: /Rpc
Application Path: C:\Windows\System32\RpcProxy\
Machine name: MS-NO-SVG-01
Process information:
Process ID: 7156
Process name: w3wp.exe
Account name: IIS APPPOOL\DefaultAppPool
Exception information:
Exception type: ConfigurationErrorsException
Exception message: Could not load file or assembly ‘Microsoft.Exchange.RpcClientAccess.Coexistence, Version=14.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.
After some research I found out that the RPCProxy webconfig file was strange/corrupted .
All Path’s in the file was incorrect: (snipp from c:\windows\system32\rpcproxy\web.config)
<codeBase version=”14.0.0.0″ href=”file:///%ExchangeInstallDir%bin\Microsoft.Exchange.RpcClientAccess.Coexistence.dll” />
The correct should be:
<codeBase version=”14.0.0.0″ href=”file:///C:\Program Files\Microsoft\Exchange Server\V14\bin\Microsoft.Exchange.RpcClientAccess.Coexistence.dll” />
Attached a file from a working server:
