I have a new client with 3 sites and I want to join/combine/trust ADs. The setup is as follows:
Site 1: No AD.
Site 2: Hosted VMs on a dedicated local domain (for the 3 servers in the VLAN only).
Site 3: Different local domain (than site 2).
The requirement is to join all sites logically and manage AD centrally with regards to GPOs etc.
What are my options and what is best practice?
I understand all the requirements in terms of firewalling or client OS requirements etc.