How can I recover my daughters account?

[Matt Solter]

I am trying to add my daughters account to my family using her phone number. I can successfully send the code notification to her phone however when she is promoted to sign in it says the phone number is associated to a Microsoft account that is not hers. We cannot secure her account or change the password or do any kind of recovery because it will not allow us to sign in. When we do a user name recovery it only shows a partial email address. We do not recognize this email. I could set her up a different account, but cannot associate her phone number to it because it is already associated to t

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