Thanks James.
I'm not entirely sure what I'm going to do.
My Essentials program has been messed with by a couple of IT people and the features that make it the simple program that it was in previous versions have been taken away.
Now the server won't recognize certain of my clients as part of the domain, and I can only connect them as peer-to-peer.
But it works pretty well, and I'm not sure I want to completely redo the server (unless you would want to take on that project, and it didn't cost too much.
I never used the Essentials remote access -- I used port forwarding in the router for Remote Desktop -- but then I got a new router and I can't figure out how to make the Port Forwarding work -- they call it something else. So I now use Splashtop, which works OK (RD was better).
However, I'm retiring in a year, so probably I won't do anything.