We recently setup GFI WebMonitor on our network which is giving me back IP's instead of User's. I'm in the process of determining whether we will be able to implement authentication on the proxy to use ISA or TMG to let it resolve but for the moment I need a way to quickly and accurately generate a list of AD usernames and the current corresponding IP address from the DHCP server. This is surprisingly more difficult then I originally anticipated.
Is there a away to either scan the IP range and get a list of usernames or scan the active directory user list and get the IP ?
I've been fooling around with nmap and powershell to do this but am currently up against a wall.
Edit
The easiest way I have actually found to accomplish this is to use a network mapping utility called netview. It generates a list of all PC's active on AD and the users logged in along with some other good info (shares, admin status etc.)