That's what I thought... but I just installed Cura on 2 new machines (laptop and desktop) and both were able to submit prints that started without confirmation on the printer. I tried resetting "Cura Connect" on the printer, but that didn't helped, I'm not sure that's related to the access control system...
Did you find a solution to this? I just set up a UM3e on our campus network, and it seems to be accessible to anyone. I thought there was an extra validation step - such as having to confirm first prints from any new PC, directly on the UM control panel, but I can't seem to find that option. Resetting Cura Connect hasn't helped either. Thanks!