I am working on a project where we need to migrate a 2003 AD domain to a 2008 R2, they also have exchange 2003 in place, and all users account would need to be migrated to exchange 2010.
So, what I know, is that we are going to create a trust between 2003 domain and 2008 R2 domain, after the trust has established I am planning to run the ADMT 3.2 so that I can migrate all users,groups etc, but how about exchange???? I know that I can dump the mailboxes to a pst file and then do the import... but what happened with the user mailbox after the migration??? it will still point to exchange 2003? if so, i will need to brake that in order to create the mail on exchange 2010, or not??? How can I a accomplish this task???
We only have 150 users, and the exchange DB is around 40GB, also any advise on the AD migration would be really appreciated.