DOCUMENT:Q277911  08-MAY-2002  [exchange]
TITLE   :XADM: Lost Mail During MoveUser Between Two 5.5 Servers
PRODUCT :Microsoft Exchange
PROD/VER::5.5
OPER/SYS:
KEYWORDS:kbExchange550preSP4fix

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The information in this article applies to:

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

When you move a user from one Exchange Server 5.5 computer to another by means
of a Microsoft Exchange 2000 server, mail sent during the move may be lost. You
may not receive a non-delivery report (NDR) for the messages that are lost.

CAUSE
=====

The logs indicate that the following steps occur automatically in a MoveUser
operation:

1. A new mailbox for the moved user is created on the destination server.

2. A different thread in the information store delivers a message to the newly
   created mailbox.

3. The administrator tool sets the InTransit flag on the mailbox that was
   created in step 1.

4. All delivery threads deliver mail for this new mailbox in the InTransitFolder
   instead of the actual folder.

5. After the move is finished, the InTransit flag is removed, and the
   InTransitFolder is flushed to the new mailbox.

6. A message arriving at Step 2 is missing, as it is delivered after the mailbox
   is created, but before it is tagged as in transit.


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:

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

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