XCON: Encapsulated Message Properties May Be Lost

 Last reviewed: February 20, 1998
Article ID: Q180679
The information in this article applies to:
  • Exchange Development Kit (EDK), version 5.0
  • Microsoft Exchange Server, version 5.5
  • Extended Messaging Application Programming Interface (MAPI), version 1.0

SYMPTOMS
A gateway developed for Microsoft Exchange Server 5.5 that calls iTnef::ExtractProps from the Exchange Development Kit (EDK) may not process all of the properties of an attachment's encapsulated message when the encapsulated message's PR_DISPLAY_TO property size is greater than 1024 bytes. When this happens, an encapsulated message may be missing the body of the message.

A gateway is just one example of a program that can experience this problem. Any program that uses the iTnef::ExtractProps method from the EDK may encounter this problem.

CAUSE

While iTnef::ExtractProps is processing the properties of the encapsulated message, OpenProperty is called and returns MAPI_E_NO_ACCESS if the property size is greater than 1024 bytes. When this happens, processing of the encapsulated message stops. It will resume with the properties immediately following the encapsulated message.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server, version 5.5. A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

MORE INFORMATION

Mapi32.dll has been changed to continue processing when this error occurs. 

Keywords          : XCON
Version           : WINDOWS:1.0,5.0,5.5;winnt:5.5
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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Last reviewed: February 20, 1998
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