Question like this has been asked on technet and all over the web, however I've yet to see a question that is specific to my scenario.
I have one forest with two domains and one exchange server instance. We divulged part of the company and as such we had to create a new domain namespace for this new company. Since the both companies are strapped for cash getting another exchange server is not an option in the foreseeable future.
Forest F1
Domain A - Original domain, Server 2008R2, Exchange 2010SP1, Lync
Domain B - New domain, Server 2012, No exchange. New users were created in domain b and mailboxes were created for users using EMC in domain A
Scenario 1 - I've tried using the various combinations of Prepare-MoveRequest.ps1, ADMT, and New-MoveRequest once it worked but I inadvertently created a new account instead of migrating a user. The documentation accompanying these scripts seem to
assume two forest and two separate exchange instances.
eg : http://blogs.technet.com/b/meamcs/archive/2011/06/10/exchange-2010-cross-forest-migration-step-by-step-guide-part-i.aspx
Scenario 2- Since most of the documentation assumes either Cross forest migration or an Exchange instance in both domains/forest. I was wondering if its possible to do the following;
- Disable user1mailbox from user1 in forest A (creating a disconnected mailbox)
- Migrate user1 to forest B using ADMT
- Reconnect user1mailbox to user1 in forest B
We must be able to provide all the exchange features OWA..etc also I must be able move these mailboxes to a new exchange server instance in domain b if needed.
If scenario 1 is the recommended way to do this I probably need to do some more reading. However it just seems for my particular scenario it seems logical to disconnect/reconnect mailboxes.