I know this is really old, but this is the closest post I've been able to find in what I'm looking for. @JohnT you mentioned that this was possible with Cisco ASA and Anyconnect. Can you point me to some documentation? I can't find any. I too would like to pass the computer ID so in NPS I can require machine group to equal "Domain Computers". I'll actually be using this via Firepower, but ASA to Firepower seems to have all the same features, maybe just in different menus.