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Q189790: XFOR: Linkage 3.2 Connectors or Exchange Connectors Crash

Article: Q189790
Product(s): Microsoft Exchange
Version(s): 5.5 3.2
Operating System(s): 
Keyword(s): 
Last Modified: 01-MAY-1999

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The information in this article applies to:

- Microsoft Exchange Server, version 5.5 
- LinkAge Message Exchange, version 3.2 
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SYMPTOMS
========

Various Linkage Message Exchange 3.2 connectors or Microsoft Exchange Server 5.5
versions of those connectors may crash during message processing if the message
contains PR_REPLY_RECIPIENT_ENTRIES that do not resolve.

CAUSE
=====

If the message contains PR_REPLY_RECIPIENT_ENTRIES and a valid value for
PR_DISPLAY_NAME cannot be found for one of these entries when resolving them
against the Exchange Server directory, the connector will attempt to access
unallocated memory, resulting in an access violation.

STATUS
======

Microsoft has confirmed this to be a problem in Linkage Message Exchange version
3.2. 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.


Microsoft has confirmed this to be a problem in Microsoft Exchange Server version
5.5. This problem has been corrected in the latest U.S. service pack for
Microsoft Exchange Server version 5.5. For information on obtaining the service
pack, query on the following word in the Microsoft Knowledge Base (without the
spaces):

  S E R V P A C K




MORE INFORMATION
================

Invalid values for PR_DISPLAY_NAME include a blank entry (NULL), or an entry
containing only one or more spaces (0x20). Such entries will be obvious in the
Exchange Global Address Book because there will be no characters under the
"Display Name" column for the entry.

Neither the Exchange Server Admin UI or the Admin Import will permit a recipient
to be created with NULL or "spaces only" in the Display Name field. However, the
SQL based Linkage Directory Exchange (LDE) provides the means to customize the
"mapping rules" used to populate Exchange custom recipient attributes. These
rules may not explicitly check for NULL or "spaces only" cases. Because the LDE
uses lower level DAPI calls to converse with the Exchange Server directory,
entries with NULLs or spaces can be introduced into the Exchange Server
directory. Therefore, this issue can be avoided if LDE mapping rules are
carefully constructed to not permit these cases to propagate into the Exchange
Server directory.

For more information about LDE mapping rules, please consult the Linkage
Administrator's Guides and the online Help.
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Keywords          :  
Technology        : kbZNotKeyword6 kbExchangeSearch kbExchange550 kbZNotKeyword2 kbLinkAgeSearch kbLinkAge320
Version           : 5.5 3.2
Issue type        : kbbug
Solution Type     : kbfix

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