Hello - I work for a company that is a consolidation of three other companies. After consolidation, the name changed. The original company's AD domain has all of the network resources, so the other company's AD domains were moved into its domain. Now, though, I need to figure out how to remove the original AD domain name which matched the original company name. When users login, they wrinkle their noses when they see the AD domain name wondering why it has remained.
I've researched a domain rename and that's out of the question. I have Exchange 2013 in a hybrid with O365, System Center, a couple of Forest Trusts, etc. I have setup a UPN suffix for the new AD domain and I can login users with that, but a few questions still remain.
1. How do I prevent users from seeing the NETBIOS name of the original AD domain? I have them login with the UPN of the new AD domain, but they still see the old domain at login.
2. Can I join computers to the new AD domain? I think this would help solve some of those problems. When they login or if they are logging back onto an active session, they see the domain they are authenticating to. I assume that's from the domain the computer has joined.