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Article ID: 252345 - Last Review: October 20, 2013 - Revision: 4.2

This article was previously published under Q252345
This article has been archived. It is offered "as is" and will no longer be updated.


The Exchange Server information store may unexpectedly stop responding and an access violation may occur.

When you view the call stack by using a debug utility, it may appear similar to the following call stack:
   FramePtr  RetAddr   Param1   Param2   Param3   Function Name
   1d4ff610  004273f8  153efff9 00000008 153c2369 0x780350a4
   1d4ff610  00428360  153efff9 00000008 153c2369 STORE!FEqCAI+0x214
   1d4ff660  00440588  153efff9 00000008 153c2369 STORE!OMSG::EcConfig+0xf3c
   1d4ff7b0  00440300  153efff9 00000008 153c2369 STORE!EcCreateOMSG+0x19c
   1d4ff820  00440878  153efff9 00000008 153c2369 STORE!EcOpenMessageOpX+0x100
   1d4ff880  00408608  153efff9 00000008 153c2369 STORE!EcOpenMessage+0x210
   1d4ff980  004080dc  153efff9 00000008 153c2369 STORE!EcRpc+0x4b8
   1d4ffa60  77d13040  153efff9 00000008 153c2369 STORE!EcDoRpc+0x74
   1d4ffa90  77d13044  153efff9 00000008 153c2369 0x77d13044


Exchange Server creates compressed addresses, and handles them as strings. The issue is caused by the way strings in the address of the mailbox and logon user object (distinguished name as based on X.500 directory name) are handled. This may cause the access violation.


To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
191914  ( ) XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack
The following files are available for download from the Microsoft Download Center:
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Download Q248838engi.exe now (
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Download Q248838enga.exe now (
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591  ( ) How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.


Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

  • Microsoft Exchange Server 5.5 Standard Edition
kbnosurvey kbarchive kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbgraphxlinkcritical kbqfe KB252345
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