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 a...
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/
VasilMichev any guide on how to match the new user accounts against the cloud mailboxes.?
You'll probably have to use the hard-match method, as I imagine their immutableIDs will already be populated.