Article ID: 2784566 - View products that this article applies to.
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The Microsoft Exchange RPC Client Access service crashes on a Microsoft Exchange Server 2010 Mailbox server. Additionally, the following Event ID 4999 is logged in the Application log: 

Log Name: Application
Date: Date
Event ID: 4999
Level: Error
Computer: Computer
Watson report about to be sent for process id: Process ID, with parameters: E12, Build Type, Version Number, M.E.RpcClientAccess.Service, M.E.Data.Storage, M.E.D.S.ServerPerformanceObject.StopAndCollectPerformanceData, System.InvalidOperationException, XXXX, Version Number.


This issue is caused by a MAPI_E_CORRUPT_DATA error that occurs when the Exchange Server 2010 Mailbox server tries to process a certain property. Then, the Exchange RPC Client Access service crashes because it cannot handle the MAPI_E_CORRUPT_DATA error.


To resolve this issue, install the following update rollup:
2746164 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 2


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Article ID: 2784566 - Last Review: February 12, 2013 - Revision: 1.0
Applies to
  • Microsoft Exchange Server 2010 Service Pack 2, when used with:
    • Microsoft Exchange Server 2010 Enterprise
    • Microsoft Exchange Server 2010 Standard
kbqfe kbfix kbsurveynew kbexpertiseinter KB2784566

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