Forum Discussion
Move mailbox data to user profile in 2nd domain forest
Scenario:
- 1 tenant contoso.onmicrosoft.com with AAD connect
- 2 domain forest (contoso.som, fabrikam.com)
- users in forest contoso.com have 10GB mailbox data each
- need to move all users and mailbox data from contoso.com to fabrikam.com (contoso.com will be deleted)
- moved users should still use SMTP domain contoso.com
What is the best way to address the migration requirement?
5 Replies
Is this related to the other thread, or a separate scenario? As in, what's the end goal here, move all the mailboxes to a single tenant in O365, or move them between the on-premises forests?
VasilMichev this is a separate scenario, target is to move users to new AD forest
So where are the mailboxes located, On-Prem or in ExO? If On-Prem, you will have to do some cross-forest moves in addition to the ADMT migration. If they are in ExO, you might be able to just to the ADMT part, then "match" the new user accounts against the cloud mailboxes.
Here are some guides to get you started: https://secureinfra.blog/2011/06/10/exchange-2010-cross-forest-migration-step-by-step-guide-part-i/
