Apples-KB-Article-Regarding-Apple-School-Manager
https://support.apple.com/en-us/HT206960

Apples-Guide-for-Apple-Business-Manager
https://www.apple.com/business/site/docs/Apple_Business_Manager_Getting_Started_Guide.pdf

Apples-Guide-for-Apple-School-Manager
https://help.apple.com/schoolmanager/en.lproj/static.html

Apples-VPP-Guide
https://www.apple.com/business/site/docs/VPP_Business_Guide.pdf