How to Find your Microsoft Account on Xbox One?

Live Account

Scroll right to Your Information and select Account Security. The Microsoft account Windows Live ID that is associated with your Xbox LIVE account is shown.

How do I Find out what my Microsoft Account Is?

Look up your username using your security contact phone number or email address.
Request a security code to be sent to the phone number or email you used.
Enter the code and select Next.
When you see the account youre looking for, select Sign in.

Is my Microsoft Account the same as my Xbox Account?

Signing up for a Microsoft account and using it on your console allows you to access Xbox Live, which means you can start earning achievements while playing games too. A Microsoft Account comprises Xbox plus other Microsoft products – Windows, Office, Outlook, Skype and more.