I've blocked MSA via group policies but there are still remnants in the OS. What packages are responsible for this? Microsoft Account service had to come from somewhere. I'm 3/4 of the way to a fully cleaned os. CRL, SPP, settings app and updates are the last things left phoning home.
I have no support app in MSMG. Its not even an option. The only 2 apps installed are the control panel and shell experience.