I have a Remote Desktop Services "RemoteApp" setup that has been working for months, that is now, apparently, not able to resolve the Host Session server and connect to it. I'm getting the "Your computer can't connect to the remote computer using the specified forward proxy configuration" error message. So, it appears to me that the RemoteApp is getting thru the Remote Gateway Server, but is then having a problem completing the connection thru to the Host Session Server. Nothing on the server has been touched (other than a loss of power at one point!?), and everything was working fine as recently as 4PM EST on 2/15/2018? If anyone has had a similar experience with RDS, any help or advice would be greatly appreciated.