Resource Forest, Account Forest - Exchange Removal questions.

BrianDesmond Thanks again. 

To be clear for myself on this process, and to make sure i have the order right, with all mailboxes already migrated  to office 365, I should do the following: 

1. Install Exchange in the Account Forest, creating a new exchange org.
2. Copy MSExchange Attributes over, I will work to copy the correct ones over as i know not all need to be copied. Account should show as "office 365" mailbox in EAC in the account forest, and should show as "RemoteUserMailbox" when checking in EMS.
3. Uninstall Exchange from the Resource Forest

Is that about right? I will of course test everything in my lab, before making any changes on the customers environment, and may reach out to PFE for a design review to be doubly sure. 

The customer also needs to migrate all their groups to office 365 as well, however for that i think the correct course of action is to create a script (or find one) that simply creates the groups in the cloud, re-assigns all group memberships and send as, send on behalf of settings, and group security settings. 

The group portion would probably need to be done first, I would imagine. 

Thanks again!!

Robert