Hopefully someone can shed some light on this because I'm just stumped.
I found a strange entry in the dhcp IP lease list. The computer name didn't follow our naming conventions and it also had a FQDN. There was no active directory account or a DNS entry for this computer.
I've been told that one of our sixth form has been plugging his laptop into the network, but if this is his laptop and he has managed to join the domain, why no AD or DNS entries?
I could do without this as we finish for Christmas tomorrow.