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Moving forests


2 questions here.

We are moving to a new AD forest, but it will have a totally new FQDN. What we need though is for the staff to retain there old email addresses and when they send mail it is from there old ones.

So for example, old email was person@abc.com, the new forest will be xyz.com but when the new excahnge is created on the new forest I still want the persons email to be person@abc.com. How is this achieved?

Also, the second question, what is the best way to move the mailboxes over. No trust but there will be network communication.

1 Solution
1)FQDN is the name the mailserver identifies itself with. So let it be the old one.
Your exchange domain does not have to be the same as the windows domain.
Use recipient policys to set up the the list of mailadresses you want. Then make sure the old one is setup as primary

2)Exmerge: extract them to a pst file and use exmerge to import them again on the new server
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