For my Ford, the manual was very helpful. Taking a look at the fuse box diagram, I was able to remove the fuse for the modem.

Thankfully I was able to verify that the modem power was secured because when I enter the infotainment settings to view the modem serial number, I can no longer see the modem serial number. It is just blank.

This won’t work for all vehicles because the modem may have the same fuse as critical equipment.

That’s odd. I’m surprised they blocked it for you. I also work for the US federal government and I haven’t had any issues with using Proton at work. I wonder why the difference.