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Move users from W2K2 AD forest to new W2K3 forest

Posted on 2005-04-11
Medium Priority
Last Modified: 2011-10-03
     My company is splitting into two different organizations. I would like to create a completely new W2K3 AD forest and move all users from the old forest to the new forest. I am pretty sure that the ADMT 2.0 can do this for me? Also I will bring up a new Exchange 2003 server in the new forest. Will I be able move all of the users mailbox and PF data from the existing exchange server (E2K3 SP1) to the new exchange server in the new AD Forest? Thanks in advance for any comments.

Question by:nicc1023
  • 4
LVL 33

Expert Comment

ID: 13755359
I have experience in migrating mail systems.  However, I don't think you can have an Exchange organization that spans multiple forests.   Here is a MS article that talks about the situation:  http://support.microsoft.com/?kbid=839049

LVL 33

Expert Comment

ID: 13755380
I think what you will want to do is create the new Forest, and install a new Exchange origanization in the forest.  Then migrate the users and machines to the new forest.

After, you can migrate the mail from the old server to the new server.  There are several techniques for this...one simple one might be to drop the mail to a *.pst file and the import the mial on the new server.

LVL 33

Expert Comment

ID: 13755411
Another approach is to use the Exchange Migration Wizard.  This wizard (provided by Exchange 2003) allows you to perform InterOrganization migrations.  This might be the easiest solution for you...


Hope some of this information is helpful/....


Author Comment

ID: 13755598
Thanks for the quick respones NJ. I would like to clarify that not all users will be moved from the old forest to the new forest. For a quick recap, this is what I plan to do:

-Create the new W2K3 Forest Root domain
-Install the new E2K3 server in the new forest
-Create a trust between the two Forests
-Move security principals (users, computers, groups) to new forest
-Move all mailboxs for effected users into new exchange organization.
-go home and get a good nights sleep.  

does look look correct?

LVL 33

Accepted Solution

NJComputerNetworks earned 1500 total points
ID: 13755711
Yes.. I understand that not ALL users will be moved.  Only some...  

Your approach looks good to me.  However, I would leave this post open for some more opinions...

In my experience, I would normally try to build a test lab to proove the theories to myself before actually implementing this.  I would suggest that you try to find some desktops and perform a test...

And by the way, the ADMT 2.0 would be a good choice for this and there are tons of documentation on how this tool works...


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