Here's the layout.
3 domains in forest...root.private, domain1.com, domain2.com
Obviously, root.private is the top of the forest.
Formerly exchange 2000 is installed in domain1.com and could manage users from domain1 and domain2.
during migration to Exchange 2007 SP1, we notice that none of the domain2 accounts or mailboxes show up in EMC.
I'm thinking this is some small step I missed or need to install a widget, but can't find any good answers on google with my searches.