I am aware of open ports, I was just exploring how things are working. Ports were only opened to specific IP address and are now closed.
All of the information you gave me in the articles I had done. The student is in the group and the group has access to the printer.
He opened Cura, opened his STL file, and sliced it. The only option he had was to save slice to file. I do the same thing and I see print via cloud and it works.
He is logged into his Ultimaker account. Going to digital factory, he can see printers and groups. He sees himself in the group.
We will try again and get back to you.
Joe