NDR Message appear after reply to old email after mailbox migration

Author:

Yuval Sinay MVP

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SYMPTOMS

After mailbox migration from one Exchange organization by using Exchange migration tool or Exchange merge utility, users that try
to reply to old email or send an update to a meeting to the recreated Mailbox, get an NDR.
 
 

CAUSE

The routing of mail in Exchange recipients is done with the legacyExchangeDN attribute, and the legacyExchangeDN attribute is changed when you recreate the mailbox.

RESOLUTION

In order to avoid that issue, export the legacyExchangeDN attribute before you delete the mailbox and add it as a Custom X500 Address.
 
If you already deleted the mailbox, you should be able to view the legacyExchangeDN when you click the recipient in an old email item
Select properties on the user name from an old email, all the field are blank besides the Display Name field that is populated the
 legacyExchangeDN of the mailbox.
 
If you are using Exchange 2000 Migration tool, a new hotfix is available from Microsoft for this issue:
 
In-Reply-To fields are lost when you move a mailbox in Exchange 2000 Server
 
 

MORE INFORMATION

Support WebCast: Exchange 2000 Server: Message Categorizer and NDR Troubleshooting

 
XADM: Workarounds for Problems with Mbconn.exe

 
Using LDIFDE to Import and Export Directory Objects to Active Directory

Properties

Article ID: 555197 - Last Review: 14 Feb 2017 - Revision: 1

Microsoft Exchange 2000 Enterprise Server, Microsoft Exchange 2000 Enterprise Server, Microsoft Exchange 2000 Enterprise Server, Microsoft Exchange 2000 Enterprise Server, Microsoft Exchange 2000 Server Standard Edition

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