DOCUMENT:Q193760  20-MAY-2002  [exchange]
TITLE   :XCON: MTA Stops Processing Messages When One Network Link Fails
PRODUCT :Microsoft Exchange
PROD/VER:4.0,5.0
OPER/SYS:
KEYWORDS:

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0 
-------------------------------------------------------------------------------


SYMPTOMS
========

If the network link to a remote site fails on a server with links to multiple
remote sites using X.400 Connectors, the message transfer agent (MTA) may stop
processing messages to all remote sites.


CAUSE
=====

The problem is due to the synchronous nature of the Microsoft Exchange MTA in
versions 4.0 and 5.0.

RESOLUTION
==========

Exchange Server 4.0
-------------------

A supported fix that corrects this problem is now available from Microsoft, but
has not been fully regression-tested and should be applied only to systems
experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the
fix. For a complete list of Microsoft Product Support Services phone numbers and
information on support costs, please go to the following address on the World
Wide Web:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

The English version of this fix should have the following file attributes or
later:

   Component: Message Transfer Agent (MTA)

   File Name      Version
   ------------------------
   Address.dll    4.0.997.2
   Dbserver.sch   4.0.997.2
   Dcprods.cat    4.0.997.2
   Ems_rid.dll    4.0.997.2
   Emsmta.exe     4.0.997.2
   Infodlog.cfg   4.0.997.2
   Infotlog.cfg   4.0.997.2
   Mmiext.dll     4.0.997.2
   Mtacheck.exe   4.0.997.2
   Mtalog.dll     4.0.997.2
   P2.xv2         4.0.997.2
   P3.tpl         4.0.997.2
   Saalog.dll     4.0.997.2
   X400omv.dll    4.0.997.2


Exchange Server 5.0
-------------------

A supported fix that corrects this problem is now available from Microsoft, but
has not been fully regression-tested and should be applied only to systems
experiencing this specific problem. If you are not severely affected by this
specific problem, Microsoft recommends that you wait for the next Microsoft
Exchange Server version 5.0 service pack that contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information on support costs, please go to the following
address on the World Wide Web:

   http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

The English version of this fix should have the following file attributes or
later:

   Component: Message Transfer Agent (MTA)

   File Name      Version
   --------------------------
   Address.dll    5.0.1461.50
   Dbserver.sch   5.0.1461.50
   Dcprods.cat    5.0.1461.50
   Ems_rid.dll    5.0.1461.50
   Emsmta.exe     5.0.1461.50
   Infotlog.cfg   5.0.1461.50
   Infoxlog.cfg   5.0.1461.50
   Mmiext.dll     5.0.1461.50
   Mtacheck.exe   5.0.1461.50
   Mtamsg.dll     5.0.1461.50
   P2.xv2         5.0.1461.50
   P3.tpl         5.0.1461.50
   P772.tpl       5.0.1461.50
   Saalog.dll     5.0.1461.50
   X400om.dll     5.0.1461.50
   X400omv.dll    5.0.1461.50


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
versions 4.0 and 5.0.

Additional query words: MTA sync synchronous network
======================================================================
Keywords          :  
Technology        : kbExchangeSearch kbExchange500 kbExchange400 kbZNotKeyword2
Version           : 4.0,5.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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