Hi My company (domain A) bought another company (domain B). I need to move mailboxes to the exchange domain B to the exchange domain A. The 2 domains are not connected together and I do not have VPN between the 2 companies. As the company domain B is hosting their exchange, I need to remove this cost. How I can do that easily? Thanks for your comments and your help... DS

That depends on your version of Exchange, the hosted version of Exchange, and probably lots of other variables. Seriously, you might consider hiring a consultant to guide you through this because migrations can be a huge pain, not the kind of thing you want to take on without experience or a whole lot of time to try everything out in a lab.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, I recommend you to have a read of the article below: Exchange 2010 Cross-Forest Migration Step by Step Guide – Part I http://blogs.technet.com/b/meamcs/archive/2011/06/10/exchange-2010-cross-forest-migration-step-by-step-guide-part-i.aspx Exchange 2010 Cross-Forest Mailbox Moves http://blogs.technet.com/b/exchange/archive/2010/08/10/3410619.aspx Regards, Xiu

Hi, Thanks for your reply. More information, my company domain A has Exchange 2007 and the other company domain B has exchange 2003. For now, we do not want to do a relationship between the 2 Active Directory. We just want that users from domain B use our exchange 2007. Otherwise users from domain b will connect to their domain b and will connect our exchange from domain a.

Then we may have resource forest for Exchange. We may configure a trust between the resource forest and the account forest. Have a look at the article below: Deploying an Exchange Resource Forest (Part 1) http://www.msexchange.org/articles_tutorials/exchange-server-2007/planning-architecture/deploying-exchange-resource-forest-part1.html Regards, Xiu