AADSTS50053 🔷 Azure

AADSTS50053: Your account is locked (Smart Lockout) / sign-in blocked due to suspicious activity

Too many failed sign-ins (or sign-ins from a malicious IP) triggered Entra Smart Lockout.

Seen on: Azure

Meaning

Old saved passwords on phones/apps, scripts retrying with a wrong secret, or password-spray attacks lock the account temporarily. The lockout clears after its duration.

Common causes

  • Devices/apps retrying an old password
  • Script with wrong credentials
  • Password-spray attack from known bad IPs

⚡ Quick fix

  1. Wait for the lockout period, then update saved passwords everywhere
  2. Reset the password via SSPR
  3. Review sign-in logs for attack IPs

Detailed fix by platform

Azure CLI

  1. # Entra ID → Sign-in logs → filter by user, status Failure, error 50053

How to diagnose

  1. Sources — Failing sign-ins’ apps/IPs
  2. Devices — Old credentials saved?

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