Migrating mailboxes from Exchange 2003 to Exchange 2007. A few mailboxes began failing to move with error: configuration,dc=domain,dc=com is not a valide value for Parameter: identity.
I took a look at the user and when looking at the user in EMC the Mailbox Server is set to that value, configuration,dc=domain,dc=com. I get the same result when looking at him using EMS.
From the Exchange 2003/AD side his mailbox server shows the correct server name. MSExchHomeServe also shows the proper server.
The only way to get the mailbox to move to 2007 was to move it to another Exchange 2003 database then move it to the 2007 server. I am figuring that this is an issue within the store itself and not a user attribute as all mail related attributes are properly set. I klnow this isn't an AD attribute because on effected users, no attribute is set to that value.
Online maintenance has been sucesfully completing as well as full backups.