You Deployed MFA. You Are Not Finished.

Multifactor authentication is the single highest-value control most organizations can deploy, and attackers have adapted. Push fatigue, adversary-in-the-middle phishing kits, and legacy authentication paths all bypass basic implementations.

Check for accounts excluded from policy, service accounts with no second factor, and legacy protocols still permitted. Exceptions granted during rollout have a tendency to become permanent.

Where possible, move high-privilege accounts to phishing-resistant methods, enable number matching, and alert on MFA method registration changes, which are a common persistence technique.