MAPI_E_CALL_FAILED errors occur when a MAPI application that uses Outlook 2007 MAPI or Outlook 2010 MAPI in online mode tries to access an Exchange Server 2010 server

Article ID: 2674185 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a MAPI application that uses Microsoft Office Outlook 2007 MAPI or Microsoft Outlook 2010 MAPI in online mode.
  • The MAPI application tries to access the Exchange server. 
  • The MAPI application is multithreaded and reads a stream of data from a Microsoft Exchange Server 2010 server.
In this scenario, the MAPI application encounters MAPI_E_CALL_FAILED errors. Additionally, the following error is logged in the remote procedure call (RPC) Client Access log on the Exchange Server 2010 Client Access server:
Exception of type 'Microsoft.Exchange.RpcClientAccess.BufferTooSmallException' was thrown.
Note By default, the RPC Client Access log is located in the following folder:
C:\Program Files\Microsoft\Exchange Server\V14\Logging\RPC Client Access
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CAUSE

This issue occurs because the Exchange server returns an ecBufferTooSmall response that the MAPI application cannot handle to a sequence of remote operations. The ecBufferTooSmall response is generated because the Exchange server detects that the sequence of remote operations may cause a potential loop between the server and the MAPI application. Therefore, the read stream operation fails with the MAPI_E_CALL_FAILED error.
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RESOLUTION

To resolve this issue, install the following update rollup:
2685289
(http://support.microsoft.com/kb/2685289/ )
Description of Update Rollup 3 for Exchange Server 2010 Service Pack 2
After you apply this update rollup, the Exchange Server 2010 server returns the ecBufferTooSmall response only if the following conditions are true:
  • The RopReadStream remote operation is the first value in the remote operation package.
  • The remote operations package is in the maximum size.
  • There are no other remote operations in the remote operation package.
Otherwise, Exchange Server 2010 server will return the RopBufferTooSmall response, which the Outlook MAPI application can handle.
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STATUS

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

For more information about random MAPI_E_CALL_FAILED errors in Exchange Server 2010, go to the following MSDN website:
Random MAPI_E_CALL_FAILED errors in Exchange Server 2010
(http://blogs.msdn.com/b/stephen_griffin/archive/2011/10/19/random-mapi-e-call-failed-errors-with-exchange-2010.aspx)
For more information about the MAPI function in Outlook 2010, go to the following Microsoft website:
General information about the MAPI function in Outlook 2010
(http://msdn.microsoft.com/en-us/library/cc815646.aspx)
For more information about the MAPI function in Outlook 2007, go to the following Microsoft website:
General information about the MAPI function in Outlook 2007
(http://msdn.microsoft.com/en-us/library/cc815646(v=office.12).aspx)
For more information about the RopReadStream remote operation, go to the following Microsoft website:
General information about the RopReadStream remote operation
(http://msdn.microsoft.com/en-us/library/ee218359(EXCHG.80).aspx)
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Properties

Article ID: 2674185 - Last Review: June 5, 2012 - Revision: 3.0
APPLIES TO
  • Microsoft Exchange Server 2010 Service Pack 2, when used with:
    • Microsoft Exchange Server 2010 Enterprise
    • Microsoft Exchange Server 2010 Standard
Keywords: 
kbqfe kbfix kbsurveynew kbexpertiseinter KB2674185
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