We always have used password authentication, but same password for all computers. Would the MS-Logon I authentication be a more secure way? So that the IT staff is a member of an vnc AD group which is allowed to do remote sessions. No password needed anymore.
And @rudi, if you have any time left, maybe a good idea to make a couple of changes to the explanation page. Like removing Windows 95, Windows 98, and Windows Millennium Edition. It looks so old now

https://uvnc.com/docs/uvnc-server/58-ul ... ation.html