Forum Discussion

Iron Contributor

Apr 05, 2019

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...

exchange

office 365

VasilMichev

MVP

Apr 05, 2019

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?

Marvin Oco
Iron Contributor
Apr 05, 2019
VasilMichev this is a separate scenario, target is to move users to new AD forest
- VasilMichev
  MVP
  Apr 05, 2019
  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/
  - Marvin Oco
    Iron Contributor
    Apr 12, 2019
    VasilMichev any guide on how to match the new user accounts against the cloud mailboxes.?