I can't sign in to my Microsoft account - Microsoft Support
https://support.microsoft.com/en-us/account-billing/i-can-t-sign-in-to-my-microsoft-account-475c9b5c-8c25-49f1-9c2d-c64b7072e735
WebIf you have forgotten your email, username, or you get a message from Microsoft that says that "account doesn't exist", use the Sign-in Helper tool below. If you have issues with getting verification codes, read our troubleshooting steps.
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