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Cross forest mail migration


We are currently running Exchange 2003 within our AD forest. For the move to Exchange 2010, we're planning on building a new AD forest, this will give us the ideal opportunity to start afresh and keep things standardised etc.

Does anyone know of any native MS tools to migrate mailboxes from one Exchange org (2003) to another (2010)? I know there is the ADMT, but I believe that is for AD accounts only? Or am I mistaken?
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you are right ADMT is to migrate accounts.

to migrate mailboxes you have 2 options

1. the PST approach
   use exmerge on the source to export and new-mailboximportrequest on the destination to import

2. use the new-moverequest that is built-in with exchange 2010 and it does support cross forest

tomd1976Author Commented:
Thanks Akhater.

So new-moverequest will move the mailbox only? Or the mailbox and the associated AD account?

new-moverequest will not "migrate" the accounts but it can create new accounts for you in the target domain, however it  in your case, it is better to use ADMT to migrate users and then the script to migrate the mailboxes.

check the link I gave you above
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