SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/sec-unusual-signin-alert

Microsoft emails you about an unusual sign-in. What should you do?

Check the Recent activity page and report it if it wasn't you.

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  1. Reply with your password to prove it's you
  2. Check Recent activity, mark This wasn't me if needed ✔
  3. Ignore it, alerts are routine

Why: Microsoft tells you to review recent activity and report anything that was not you. Go to your account page yourself instead of trusting links in the message, since fake alerts exist too.

Huh, didn't know that: Microsoft says to choose This wasn't me if the activity wasn't yours or you're just not sure.

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References

Answer: Check Recent activity, mark This wasn't me if needed. Microsoft tells you to review recent activity and report anything that was not you. Go to your account page yourself instead of trusting links in the message, since fake alerts exist too.

  1. Microsoft Support: What happens if there's an unusual sign-in to your account support.microsoft.com/help/13967
    check your Recent activity page and let us know if it wasn't you.
    Checked 2026-10-10.
  2. Microsoft Support: What is the Recent activity page? support.microsoft.com/help/13782
    Choose This wasn't me if the activity wasn't yours or you're just not sure if it was you.
    Checked 2026-10-10.

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