I have looked into just moving the database files however to my knowledge i cannot rename the organization so this will not work. The only two other options i can think of are to use the exchange 2003 migrations wizard or exmerge.
I would prefer to use the exchange migration tool but from my reading it will create user accounts in the new active directory. Unfortunantly the server is already in use and has user accounts with identical names as the server i am migrating from. I need to know if this will cause an issue when using this tool or if there is a way to just migrate the mailboxes then mount them onto the appropriate accounts.
ExMerge seems like it would work however it appears to be a much longer and less efficiant method so i would prefer to avoid it.
What are my best options here?