Enough of this garbage!
I have wasted almost 3 hours already just trying to add my child's login to another one of my child's computers! It started with the Microsoft Authenticator app, since I changed my lock screen, finally sorted that, then when she tries to login to her account, it says it sent a code to her email address. Log onto her account on other computer, no code(s) in email, WTF!!! I've tried dozens of times since yesterday, verified email, etc. etc.. There's no option to choose the login method, of course, so figure I'd try to reset the password and see if that changes anything and here I am.
What a big, steaming, stinky pile of over-engineered, useless trash for such a simple task. As a software developer / engineer, I find this completely unacceptable, but not surprising in the least. Whoever is over this should be fired like yesterday.
To add insult to injury, Microsoft is now trying to force all accounts to be "online" Microsoft accounts so they can use their telemetry to track everything about you.
That said, I know of ways to still create a local-only account. I will do that until I no longer can and then I'll switch 100% to Linux, and the kids will just have to learn. Screw this.