Can we migrate Exchange 5.5 intact, or should we install Exchange 5.5 on the new forest and use Exmerge to move the mail? Some people think we can install Exchange 5.5 before the migration, and some think we should install after we are members of the Army forest.
What would you do?
This way the original Exchange 5.5 servers will exist as member servers in the new Active Directory domain; the service account for Exchange is an Active Directory object; and, lastly, the accounts used to log into the mailbox are the new Active Directory accounts.
This article might be helpful as well: How to change the service account password.
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