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Domain and Exchange Mirgration question

For political reason I have to create a new domain and move all my users over..

Old Domain is say AAA and new domain is BBB

1.) How do form a two trust relationship with these domains....

2.) Can I move users form AD in AAA to AD in BBB

3.) If exchage is still in AAA will users be from BBB be able to access receive email ?

Firstly I plan to create a two-way trust in Active Directory Domains & Trusts.

Ok so at this point I will have one exchage server and domian controller  in AAA and one of each in BBB - Is it posile to migrate the users from the AD and Exchage on AAA to BBB all in one go ?

i know I can use ADMT (Active Directory Migration Tool) from Microsoft to move the uses and Exchange system manager to move the mailbxs but in what oder do I do it or will ADMT (Active Directory Migration Tool) from Microsoft do the exchange mail bxes as well ?

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You say for "political reasons", but does this mean that the old domain (AAA) will be (eventually) made redundant, and removed from the forest, or is it going to be kept and used for a finite number of users?
If you haven't created the second domain yet, just make sure you create it within the same forest, with a two way trust, and then yes, exchange within AAA will still be accessible by users on BBB.
As for moving the mailboxes over, you have a few options, one would be to use exmerge to save all your mailboxes as PST's and then use exmerge again to import them to the new exchange (messy), or you can place the two exchange servers within the same organisation, and migrate the exchange server users connect to by using the exchange features within Active Directory Users and Computers (or Exchange System Manager).
ise438Author Commented:
Yep it will be made redundtant once mirgration is complete..

Also so can I have an exchange server in domain AAA and a exchange server in domain BBB - but have them both in the same or organisation ?
Exchange organisations are at the forest level, so yes, you can share organisations across domains within the same forest.

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