Forum Discussion
Moving Exchange Account Source Account
I have a very complex environment I'm hoping someone might jump start my search. We have two domains syncing to Entra ID. One domain is a resource forest where our Exchange environment sits. That dom...
Yes, this scenario (migrating from an Exchange resource forest with linked mailboxes into a single account forest) is well-documented. The first step is indeed to update your primary forest schema to Exchange 2016 CU23 (or at least a supported level) before moving attributes. After that, you’ll need to carefully migrate mailbox anchors, linked attributes, and Entra ID sync rules:
https://learn.microsoft.com/en-us/answers/questions/646635/migrate-users-from-forest-to-a-forest-containing-l