At my old company, we had a system where we had a limited number of physical machines that multiple testers would need to remote into. We didn't want to disallo

At my old company, we had a system where we had a limited number of physical machines that multiple testers would need to remote into. We didn't want to disallow two people logging in simultaneously because sometimes that was necessary, and if someone stayed logged in then wen to lunch, where was no way to kick them off to get access without waling to the server closet, pulling up the machine on the KVM, and kicking them that way. I wrote some VBScript that wrote a locking folder into a sub-folder in a network folder, then launched VNC targeting the proper VM. When VNC was closed, the script would complete and delete the locking folder. That let us know what was available and when. I always thought it was hacky, but at ~60 lines it's incredibly simple and has never really failed.