Small domain, with Windows Server 2012. Several users connect to their work PCs when off site. Usually I have no problem in setting this up for them.
About 4-6 weeks ago one user bought himself a new, Dell, Windows 7 OptiPlex PC for home use. It runs Windows 7 Pro. I set up an RDP connection to his work PC and tested it from home, as I usually do, to make sure it works OK. I sent him the link and it fails to connect. I took home his personal PC and tested it. No luck at all. I changed the firewall setting - I even completely disabled his firewall, temporarily. I'm sure the RDP connection is set up, as I've copied it from my own (Windows 10) PC, on which it works OK. When I turn in my chair, to my PC, I can connect straight away! On his the message is: Your computer cannot connect to the remote computer because the Remote Desktop Gateway server is temporarily unavailable. Try reconnecting later or contact your network administrator for assistance.
Any thoughts, please?
Slam JL