A year or so ago, I had a consultant do some work on my network. We were still running 2003 servers and AD at the time. He suggested to migrate over to 2008 but because it wasn't part of the scope of the project, we didn't really plan on it entirely. What I assume the consultant did was create a 2008 server and made it as one of the domain controllers, eventually making it the primary. The problem is, when I do any AD stuff (Administrative Template) I see "Classic Administration" and everything still seems to be 2003 AD.
1. How can I ultimately know if I am running on 2008 AD or 2003 AD?
2. And if I am still on 2003 AD, what is the best path of upgrading it to 2008 AD?
3. Should I stick to 2008 AD or continue migrating to 2012 AD?
4. Can I just upgrade from 2003 AD to 2012 AD?
I wanted to run the latest WSUS on 2012 but I think it is conflicting with the old 2003 AD (Not sure).