If you think someone might have unauthorized access to your account, we can protect you by signing you out from all of your trusted devices.
Within 24 hours, you will be signed out of browsers, apps and anywhere else your account is used to sign in, except an Xbox console. Learn how to sign out of your Xbox.
To sign out everywhere
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Sign in to your Advanced security options on your Microsoft account security dashboard.
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Scroll down to Sign me out and select Sign me out.
Note: Sign out may take up to 24 hours.