How to sign in to a Microsoft account - Microsoft Support
https://support.microsoft.com/en-us/account-billing/how-to-sign-in-to-a-microsoft-account-2ffedaca-6e1b-bc18-f28c-58539e1cb6d3
WebEnter your email, phone number, or Skype sign-in that you use for other services (Outlook, Excel, etc.), then select Next.
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