Unauthorized Sign-In to My Microsoft Account

A successful sign-in means the correct primary credential was accepted. If the same entry also shows Sign-in blocked (account compromised), Microsoft’s security systems detected suspicious activity and blocked the session before full access was granted.

To check whether unauthorized access may still exist and secure the account:

1. Open the Recent activity page at https://account.live.com/Activity.
   • Review activity from the last 30 days.
   • Expand each event to check location details and how the account was accessed.
   • If an item appears under Unusual activity, select This was me or This wasn’t me.
2. Change the account password immediately.
   • Microsoft recommends changing the password and updating security settings if there is concern that someone accessed the account.
3. Update security settings.
   • Go to the Security settings page at https://account.live.com/p?uaid=0565c61db31841478e349ab0140d94e6.
   • Update security info and review trusted devices.
   • Remove all trusted devices if needed.
4. Keep two-step verification enabled.
   • If sign-in attempts are unsuccessful, Microsoft recommends two-step verification because a guessed password alone is not enough to access the account.
5. If the account is a work or school account, review sign-in details in My Account.
   • Sign in to https://myaccount.microsoft.com/.
   • Select Recent Activity from the left pane.
   • Review the operating system, browser, app, and location for each sign-in.
   • If an entry shows Additional verification failed, invalid code, the password succeeded but two-step verification failed. Microsoft recommends changing the password and updating security settings in that case.
6. If access to the account is lost or the account is locked, use the account recovery path.
   • Sign in at https://account.microsoft.com to unlock the account.
   • If sign-in is not possible, use the Microsoft account sign-in helper.

About Microsoft support investigation:

• Consumer Microsoft account guidance directs users to review Recent activity, change the password, and update security settings.
• For additional help, use Contact Microsoft Support through the public support flow.

• Check the recent sign-in activity for your Microsoft account
• What is the Recent activity page? | Microsoft Support
• Microsoft account has been locked | Microsoft Support
• View your work or school account sign-in activity from My Sign-ins | Microsoft Support