If you want to give support within the user session, and do that comfortably, read https://www.experts-exchange.com/articles/33768/Using-RDP-shadowing-for-convenient-user-support-and-remote-control.html
However, be aware that inserting passwords within the user session is never a good idea as it is insecure. The account that you utilise should be activated only for the time of support.
Fred, your feedback is required.
It's great at removing access for tinkerers.
Both parts are excellent write ups. Go for it!