DOCUMENT:Q260060  06-AUG-2002  [exchange]
TITLE   :XCON: Routing Calculation Complete, Registry Appears Corrupted
PRODUCT :Microsoft Exchange
PROD/VER:winnt:4.0,5.0,5.5
OPER/SYS:
KEYWORDS:exc4 exc5 exc55

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The information in this article applies to:

 - Microsoft Exchange Server, versions 4.0, 5.0, 5.5 
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IMPORTANT: This article contains information about modifying the registry. Before you 
modify the registry, make sure to back it up and make sure that you understand how to restore 
the registry if a problem occurs. For information about how to back up, restore, and edit the 
registry, click the following article number to view the article in the Microsoft Knowledge Base:

   Q256986 Description of the Microsoft Windows Registry

SYMPTOMS
========

When the Microsoft Exchange Server system attendant performs a routing
calculation, the following event may be logged in the Microsoft Windows NT Event
Viewer application event log:

   Event ID: 5000
   Type: Error
   Source: MSExchangeSA
   Description: Recalculation of the routing table is complete. Result: The
   message transfer agent (MTA) information in the Windows NT registry appears to
   be corrupted.
   Take steps to repair or restore the registry entries for the MTA.

CAUSE
=====

This issue can occur if the message transfer agent (MTA) is missing a crucial
registry entry that defines its own X.500 Distinguished Name (DN).

RESOLUTION
==========

To resolve this issue:

1. Add the missing registry entry:

WARNING: If you use Registry Editor incorrectly, you may cause serious problems
that may require you to reinstall your operating system. Microsoft cannot
guarantee that you can solve problems that result from using Registry Editor
incorrectly. Use Registry Editor at your own risk.

   a. Start Registry Editor (Regedt32.exe).

   b. Locate the following key in the registry:

   HKEY_LOCAL_MACHINE/System/CurrentControlSet/Services/MSExchangeMTA/Parameters

   c. On the Edit menu, click Add Value, and then add the following registry
      value

   Value Name: X500DN
   Data Type: REG_SZ:
   Value:
   /o=<organization>/ou=<site>/cn=Configuration/cn=Servers/cn=<server_name>/cn=Microsoft
   MTA

      where <organization> is your correct organization name, <site>
      is your correct site name, and <server_name> is the correct name of
      the Exchange Server computer.

   d. Quit Registry Editor.

2. Stop and start the Exchange Server MTA services.

3. Recalculate your site routing:

   a. In the Exchange Server Administrator program, click to expand the Site
      object, click Configuration, and double-click the Site Addressing object
      to open its properties.

   b. Click the Routing tab, and then click Recalculate Routing. The following
      message is displayed:

   It will take several minutes for the new routing information to be replicated
   across your site and then take effect.

   c. Check the Event Viewer application event log and wait for the following
      event to be logged:

   Event ID: 5000
   Source: MSExchangeSA
   Type: Information
   Category: General
   Description: Recalculation of the routing table is Complete. Result: The
   operation has completed successfully.


Additional query words:

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Keywords          : exc4 exc5 exc55 
Technology        : kbExchangeSearch kbExchange500 kbExchange550 kbExchange400 kbZNotKeyword2
Version           : winnt:4.0,5.0,5.5
Issue type        : kbprb

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