94% of breaches start with compromised credentials. If your Windows desktops and servers still rely on passwords alone, even with Active Directory, you are one phishing email away from a breach.
Why Windows Passwords Fail
- Phishing & Credential Stuffing — reused or stolen passwords let attackers walk straight through the front door.
- RDP Brute Force attacks — exposed Remote Desktop endpoints are scanned and attacked continuously.
- Pass-the-Hash / Pass-the-Ticket — attackers reuse cached credentials to move laterally without ever knowing the password.
- Offline device theft — a stolen laptop with a cached password is an open door once offline protections are missing.
What is AD MFA for Windows?
AD MFA integrates directly with your on-prem AD or Azure AD / Entra ID to enforce a second factor before Windows allows logon.
Unlike app-level MFA, it protects the OS layer itself — local logon, RDP, UAC elevation, and unlock.
How AuthNull AD MFA Works
Step 1: Sync Identity
Connect your AD / Entra ID. Choose sync scope — all users or specific OUs/Groups.
Step 2: Install Lightweight Agent
Deploys on Windows machines via GPO/SCCM/Intune. No reboot is needed.
Step 3: Set Policy
In the AuthNull console, create a policy — for Group = Finance, Action = MFA Required; for Service Accounts, Action = Allow.
Step 4: User Experience
User enters password → gets a push notification on Okta Verify / Duo / AuthNull App → approves → Windows logs in. Works even offline with cached TOTP.
Key Features to Look For
- Offline MFA Support — critical for remote workforce.
- RDP & UAC Protection — not just a logon screen.
- Granular Policy Engine — enforce MFA only for privileged groups.
- No Cloud Dependency — must work fully on-prem if you need it.
- Real-time Logs — see who logged in, from which IP, with which protocol (Kerberos/NLA).
Business Impact
With AuthNull Windows AD MFA, customers reduced credential-based incidents by 90% and achieved compliance for ISO 27001, SOC 2, and NIST 800-63.
Ready to secure your Windows? Book a 15-min demo of AuthNull AD MFA.