Our system administrators already used ADMT to migrate our users, taking all defaults. However, our email admin didn't know he should have ran prepare-moverequest.ps1 beforehand. So we now have our target users, of course, without various Exchange attributes that ADMT excludes by default, including proxyaddresses, which the .ps1 file needs.
Is there any way to easily transfer whichever attributes (instead of doing manually one-by-one per user) the prepare-moverequest.ps1 script will need, from the source to the target domain/forest, so we can then migrate the mailboxes to the new server?
I found this script http://blog.powershell.no/tag/exchange-server-cross-forestadmt/ this guy made to get around the issue. Should this work?