A KMS server is supposed to "advertise" itself on the network. When I installed Windows 7 Enterprise demo on my computer and entered the GVL key (just to try if it accepts it), the system automatically found the KMS host and activated itself without a question. Actually it was quite annoying as I didn't intend to use it. I am on a school network as well, but I have no rights to use the KMS server. If your system cannot find the KMS host on the internal network by itself, it's possible that it doesn't support Windows 8 yet. But if you still want to try, a google search with the school name and the word kms should show something. Usually people talk about it and solve issues on mailing lists, which then get indexed by google.
I found it in regedit... I tried it but I think I need to attach my computer with a ethernet cable to their network to activate. Activating over wifi doesn't seem to work.
That list's the KMS Server which were used to activate that Windows version only, NOT the running KMS Server on the network connected!
nslookup doesn't append the domain name automatically so you're asking your name server to ask the root servers for records they can't know. The command to enter would be Code: nslookup -type=srv _vlmcs._tcp.<local domain name>