Does anyone know if its possible to disable the front USB ports on a MR2? We’re in a higher learning environment where we don’t want anyone to just walk up and print.

You can buy (or likely 3d print) usb port locks. They won’t prevent a determined person but will make the point and prevent most people. Edit: I should have added I think to this. I’ve never used these for usb only for network cables and I’m not sure how they would lock in. It still seems easier to use a physical lock so you still have access to the ports without changing settings or firmware Everytime. Even a surface mount Kensington lock kit could do the trick nicely.