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Microsoft blocks Windows 11 workaround that enabled local accounts
(www.pcworld.com)
Social Experiment. Become Me. What I see, you see.
it's not just an email, they want you to have a whole microsoft account to tie all your stuff to.
that's what temp email or aliases are used for, but i guess knowing microsoft they'll ask you excessive amount of verification everyday so it's probably useless in that case.