Article ID: 2880290 - View products that this article applies to.
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Assume that your DisplayName property is blank in a Microsoft Exchange Server 2010 environment. Additionally, assume that Microsoft Outlook is running in ANSI online mode, and you have an online profile to receive email messages. In this situation, the Microsoft Exchange RPC Client Access service (Microsoft.Exchange.RpcClientAccess.Service.exe) crashes. Therefore, you cannot access your mailbox. Additionally, the following event is logged in the Application log on the Client Access server:

Time: Time
ID: 4999
Level: Error
Source: MSExchange Common
Machine: Computer
Message: Watson report about to be sent for process id: ProcessID, with parameters: E12, BuildType, Version Number, M.E.RpcClientAccess.Service, M.E.RpcClientAccess.Handler, M.E.R.H.HandlerObjectHelper.DoesEncodingUseFallbackCharacters, System.ArgumentNullException, xxxx, Version Number.
ErrorReportingEnabled: False


This issue occurs because a System.ArgumentNullException exception occurs in the DoesEncodingUseFallbackCharacters function.


To resolve this issue, install the following update rollup:
2891587 Description of Update Rollup 3 for Exchange Server 2010 Service Pack 3


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

More information

For more information about the RPC Client Access service, go to the following Microsoft website:
General information about RPC Client Access service


Article ID: 2880290 - Last Review: November 25, 2013 - Revision: 2.0
Applies to
  • Microsoft Exchange Server 2010 Service Pack 3, when used with:
    • Microsoft Exchange Server 2010 Enterprise
    • Microsoft Exchange Server 2010 Standard
kbqfe kbfix kbsurveynew kbexpertiseinter KB2880290

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