I want to use an MDM solution to manage Apple devices. Is it possible to use devices that I acquired from different sources like Amazon, used devices from eBay, or my own current device that I am using privately?
Or to put another way, does the usage of an MDM solution (like Apple Business Manager/Apple School Manager) require special Apple devices that are only intended for this kind of purpose?
It would also be nice if someone can point me to an Apple document, that deals with this topic.