I am needing a little advice. We have been acquired by another company and we have a few networking, domain challenges in front of us. They are planning o acquiring more companies besides ours, and we will have other networks who will be joining ours. Currently we have the largest of the two networks. We have a domain controller compA and two other dc's in satellite offices in other states via point to point vpn connections. The company that acquired us CompB has one DC. We are thinking we may setup a DC in Azure and have that the main DC with all the roles on that DC, and call that DC a separate local domain name other than what we have. domainA, domainB, and the new domain will be DomainC. My question is: how does this work? Will all the users be able to log into domain A, B, or C ? Do you just install the new DC and trust the other two domains, and eventually migrate the PC's to the new DC, and then at some point demote and promote back the other DC's to match the new domain name? Not sure on the best way to do this, but do not that we want a new local domain so that eventually we all login to the same domain. We have 150 users in different cites and they have about 50 users locally and 20 in different cites who terminal service in.