How to diagnose a problem like this?

Hi there,

I was writing more details then needed I think.

The problem is the following: in my company we have several headquarters and one of them is the main one, where we have the most part of our Informative Systems.

Some users connect to the main HQ on a Terminal Server using, of course, rdp.

Sometimes, randomly in term of time and in term of machine, they experiment disconnections of the rdp session.

In the meanwhile I check the connection with that system (the terminal server) using PRTG Network monitor (or other tools, like a ping) and I can't see any interruption.

If I remotely connect with the problematic client using Anydesk I'm suddenly disconnected at the same time of the rdp disconnection.

Now, ping is connection-less, I know, and this is probably because I can't see any disconnection. I think that something is breaking an active connection, but doesn't make the host unreacheable. I can't know how to diagnose, monitor and/or check this problem to have some data to analyze.

Anyone can help?