Single on-prem AD forest Exchange migration to Multiple Office 365 tenants
Hi Community, One of our customer has about 12 Exchange servers in single AD forest with 10,000 mailboxes. They've multiple organizations segregated by Organization Units (OUs), Let's Say they've the below forest, On-prem AD Exchange 2016 server Organizations are segregated by OU1, OU2, OU3 etc. They'd like to migrate OU1 to M365 tenant 1 and OU2 to M365 tenant 2 and OU3 to M365 Tenant 3. Question: 1. What is the best approach for this type of migration, having single AD forest and migrate the mailboxes from different OUs to different tenants? 2. Can we get this done with Hybrid or 3rd party migration? Any guidance would be of great help! Many thanks!