Undeliverable messages to newly migrated Exchange user

Posted by johnnyb10 on Server Fault See other posts from Server Fault or by johnnyb10
Published on 2010-12-01T14:12:01Z Indexed on 2011/01/15 19:55 UTC
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email

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exchange

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exchange-2007

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exchange-2003

We are in the process of migrating from our old domain to a new one, part of which involves migrating mailboxes from Exchange 2003 to Exchange 2007. A bunch of users have been migrated already without problems. However, one of the users is having trouble receiving emails from others. When someone sends to him, they get an Undeliverable NDR that says "A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients." The message shows the user's distinguished name as /OU=OurDomain/CN=Recipients/CN=USER57137172. The user's account name should just be "USER", so I don't know where the extra numbers ("57137172") are coming from. Thanks in advance.

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