DOCUMENT:Q252345  01-JUN-2001  [exchange]
TITLE   :XADM: Information Store Stops with Access Violation in FEqCAI
PRODUCT :Microsoft Exchange
PROD/VER:winnt:5.5
OPER/SYS:
KEYWORDS:exc55 kbExchange550preSP4fix kbExchange550sp4Fix kbgraphxlinkcritical

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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SYMPTOMS
========

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

CAUSE
=====

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.


RESOLUTION
==========

To resolve this problem, obtain the latest service pack for Exchange Server 5.5.
For additional information, please see the following article in the Microsoft
Knowledge Base:

   Q191914 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack


The following files are available for download from the Microsoft Download
Center:

   x86: DownloadDownload Q248838engi.exe now
   (http://www.microsoft.com/downloads/release.asp?ReleaseID=25443)
   Alpha: DownloadDownload Q248838enga.exe now
   (http://www.microsoft.com/downloads/release.asp?ReleaseID=25444)

For additional information about how to download Microsoft Support files, click
the article number below to view the article in the Microsoft Knowledge Base:

   Q119591 How to Obtain Microsoft Support Files from Online Services

Microsoft used the most current virus detection software available on the date of
posting to scan this file for viruses. Once posted, the file is housed on secure
servers that prevent any unauthorized changes to the file.

STATUS
======

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

Additional query words:

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Keywords          : exc55 kbExchange550preSP4fix kbExchange550sp4Fix kbgraphxlinkcritical 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : winnt:5.5
Issue type        : kbbug
Solution Type     : kbfix

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