On a computer that is running Microsoft Exchange Server 2010, the Exchange RPC Client Access service crashes. When this happens, you find the following error in the Application event log.
Source: MSExchange Common Event ID: 4999 Task Category: General Level: Error Description: Watson report about to be sent for process id: <process ID>, with parameters: E12, <build type>, <application Version>, RpcClientAccess, M.Exchange.RpcClientAccess.Parser, M.E.R.PropertyValue.CheckValueTypeOnConstruction, System.ArgumentException, <callstackHash>, <assembly Version>.
To resolve this problem, install the following update rollup:
976573 Description of Update Rollup 1 for Exchange Server 2010