Happened to many people. The system claims it's because of some suspicious activity but everybody who gave in to this blackmail and submitted personal details said that after logging in there was no notice of anything suspicious.
since this is a game it's probably mostly kids whose identifying information Microsoft is hunting for. I can't believe it's legal and the company was not sued yet
me I just pirate it now, never played on servers anyway.
And this is why you know age verification is not done to make sure kids are protected.
My friends and I play on a private server that I run in offline mode because some of us got locked out of our accounts. Didn't matter having to give (fake) personal info, but that didn't even get you into the account cause of the broken email verification.