DOCUMENT:Q196045  24-APR-1999  [exchange]
TITLE   :XCON: DRAS Connector Fails Connecting to Multiple Sites
PRODUCT :Microsoft Exchange
PROD/VER:WinNT:5.5
OPER/SYS:
KEYWORDS:exc55sp2fix

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The information in this article applies to:

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

When you use a Dynamic RAS (DRAS) connector to connect to more than one remote
site, the Microsoft Exchange Mail Transfer Agent (MTA) may stop responding
(hang) and mail to the remote sites will not be delivered. This behavior may be
accompanied by Event ID 51 messages in the Windows NT Application Event Log.

Note that a DRAS connector to just one site does not exhibit the problem.

CAUSE
=====

The synchronizationTable index for RAS threads was incorrect. Two RAS threads
being started at the same time could potentially access the same RAS table index
causing problems at different layers of the message transfer agent (MTA) stack.

RESOLUTION
==========

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

   Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack


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

   Component: Message Transfer Agent (MTA)

   File Name      Version
   -------------------------
   Dbserver.sch   5.5.2419.0
   Dcprods.cat    5.5.2419.0
   Ems_rid.dll    5.5.2419.0
   Emsmta.exe     5.5.2419.0
   Info4log.cfg   5.5.2419.0
   Infodlog.cfg   5.5.2419.0
   Infollog.cfg   5.5.2419.0
   Infotlog.cfg   5.5.2419.0
   Mtacheck.exe   5.5.2419.0
   Mtamsg.dll     5.5.2419.0
   P2.xv2         5.5.2419.0
   X400om.dll     5.5.2419.0
   X400omv1.dll   5.5.2419.0


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5.
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Keywords          : exc55sp2fix 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : WinNT:5.5
Issue type        : kbbug
Solution Type     : kbfix

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