Hi all, I was refered to ask here: Two exisitng forests(two seperate exchange organizations )and are going to form the new forest; If I migrate users (using ADMT) from two existing forests to the new forest and keep two existing exchange servers. Will migrated users in the new forest can access the existing exchange servers? Thank you.

If trusts are in place and you do the migration properly, they should. ADMT applies SID history, so the SID of the old account should migrate to the new account enabling the user to gain access to the mailbox in the other domain. I recommend you try a test user before going whole hog. -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "John JY" wrote in message news:58cdf4c5-e893-469b-975e-e7282ec2d742... Hi all, I was refered to ask here: Two exisitng forests(two seperate exchange organizations )and are going to form the new forest; If I migrate users (using ADMT) from two existing forests to the new forest and keep two existing exchange servers. Will migrated users in the new forest can access the existing exchange servers? Thank you. Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."