Hi,
Background:
One forest, two domains; abc.com and child.abc.com
Exchange 2007 in abc.com and Exchange 2007 child.abc.com
Mimecast smart host
Requirement
Upgrade to Exchange 2013 in abc.com and migrate users from abc.com and child.abc.com then decommission Exchange 2007 in both root and child. Mailboxes must be separated by their location, no DAG is wanted.
Is there a specific prefered order to this? Should we migrate root domain users to Exchange 2013 first, then migrate child mailboxes to new root domain Exchange 2013? Users should access Exchange in there location so need to create a AD site and subnet for branch users.
What is the impact of installaing 2013 in the root domain environment with child.abc.com Exchange 2007 still in production.
Thanks.