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Q275616: XCON: Messages Are Lost When Domain Controller Is Unavailable

Article: Q275616
Product(s): Microsoft Exchange
Version(s): 5.5
Operating System(s): 
Keyword(s): exc55 kbExchange550preSP4fix kbExchange550sp4Fix
Last Modified: 08-MAY-2002

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The information in this article applies to:

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

If you attempt to send messages through an Exchange Server 5.5 computer, and the
domain controller becomes unavailable in the domain in which the Exchange Server
5.5 computer is a member, some of the messages may be lost. When this problem
occurs, you do not receive a non-delivery report (NDR), and the messages are
never delivered.

CAUSE
=====

This problem occurs when the message transfer agent (MTA) cannot obtain the
information it needs to deliver the messages from the directory service. The
domain controller must be available for the MTA to obtain this information.

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:

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



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:

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

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