XCON: DRAS Connector Fails Connecting to Multiple Sites

ID: Q196045

The information in this article applies to:

Microsoft Exchange Server, version 5.5

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.

Keywords : exc55sp2fix
Version : WinNT:5.5
Platform : winnt
Issue type : kbbug