"Now just to be clear, migrating from Mojang to Microsoft accounts is 'mandatory'." Whoever made the poor word choice of "mandatory", rather than "required", ought to leave marketing altogether and instead teach in a middle school.
Coming from Spanish it took me a while to learn/grok "mandatory"/"compulsory" (in Spanish we use the way simpler "hay que"/"tienes que", which would be like just "there is"/"have to"), so I thought that phrase was totally fine! Why would it be better "required" in this situation instead of "mandatory" if you don't mind me asking?
"required" from Latin requīrō (“i seek, ask for”), compare: "request" and "aquire"
Today the words are mostly interchangeable, but mandatory is more often used in context of laws and government while "required" is seen mostly in tech and engineering.