When I login to my works server running Windows 2012R2 using Windows 7 or 10 remote desktop I am experiencing trouble with the connection breaking all the time - like every 5 minutes, leaving me to re-establish. For example today, the network is quiet and when I made a remote connection I only saw the background image of the server desktop and no icons. The problem seems to be as if its struggling to connect and this always happens on the first attempt and sometimes the second. When I keep trying I eventually make the connection and then it lets me in but I am booted out by the connection disconnecting after a short period.
This also happens on a VM I'm running hosting Server 2012 R2 - so its happening on the host and also a VM. I've tried 2 different ISP broadband connections and exactly the same.
I am using SonicWALL Global VPN to connect to the network and then I use mstsc /admin on my windows 10 machine to login via remote desktop. I have disabled the firewall but its still the same so pretty annoying.
Does anyone have any idea what could be causing this?