Hi,
I'm piloting an Exchange 2003 to 2010 cross forest migration.
I've set up the two way trust, connectors, etc.
If I create a new mailbox on the 2010 instance and a new contact in the 2003 forest I can send email back and forth ok.
If I use the ./Prepare-MoveRequest.Ps1 / ADMT / New-MoveRequest I get a 5.4.6 NDR when I send an email to that recipient. Note that the login is still there on the 2003 domain... not sure what I need to adjust and can't seem to find any mention of this. I would prefer to retain the original login as that is on the client domain and we aren't ready to migrate our clients yet.
Best,
S'