Entra ID’s Next-Gen Zero Trust: Adaptive Authentication and Enterprise Security Unlocked

When Microsoft rolled out their June 2024 Entra ID update—featuring adaptive authentication driven by real-time AI risk signals—the practical implications for Zero Trust were immediate. Enterprise IT teams, long frustrated by static policies and slow threat response, now have a stack that actually adapts to real-world risk. But these new capabilities are both powerful and easy to misconfigure. Let’s dig into what’s changed, how to deploy it, and what pitfalls to avoid.

WHAT’S NEW RIGHT NOW: Adaptive Authentication Powered by Microsoft Security Copilot

The headline feature is Adaptive Authentication, now generally available for Entra ID tenants with Premium P2 licenses. Microsoft Security Copilot—a large language model trained on real Microsoft security incidents—now feeds risk signals directly into Conditional Access. Instead of relying solely on static device, location, or sign-in risk, Entra ID can assess user behavior, session context, and threat intelligence in real time. This means:

• Risk scores are no longer just traffic-light signals (Low, Medium, High). Now, they’re informed by anomalous activity (impossible travel, privilege escalation, lateral movement), plus threat data from Defender and Sentinel.
• The Risky Users and Risky Sign-ins blades in the Entra portal show richer reasoning (what triggered the risk), not just a generic tag.
• Admins can set Conditional Access policies to require MFA or block access only when Copilot flags a session as high-risk, even if User Risk is still low.

To enable this, go to Portal > Entra ID > Protection > Conditional Access > Policies and look for the new “Adaptive Risk” condition. You’ll need P2 licensing. The risk signals feed from Copilot’s real-time model, not the legacy Azure AD Identity Protection heuristics.

WHAT’S COMING: Unified Risk Engine, App-Level Risk, and Custom Controls

Microsoft’s public roadmap (last updated June 2024) shows several major advances scheduled for Q3–Q4:

• Unified Risk Engine—combining signals across Entra ID, Defender, Sentinel, and Purview. This will enable risk-based policies for guest users and external identities, not just internal accounts.
• Application-Level Risk—coming in preview, where risk is calculated per app (e.g., SharePoint vs. custom SAML app), allowing differentiated controls. Expect a new Risk per Application API endpoint in Microsoft Graph.
• Custom Authentication Controls—ability to plug in third-party risk signals (via Graph API) and trigger custom MFA options or step-up authentication. This is currently in private preview, but several ISVs (including Okta and Ping) have demoed integrations.

Teams should prepare by reviewing their licensing and assessing which applications and user groups would benefit most from granular, risk-based controls. Watch for updates at Microsoft’s Security Blog.

WHY THIS APPROACH IS BETTER: Concrete Gains Over Legacy Azure AD

Compared to the old Azure AD Identity Protection stack, the Entra ID adaptive approach offers:

• Real-Time Risk Evaluation: Legacy risk scoring polled signals every few minutes and was slow to reflect lateral movements or privilege abuse. Copilot’s model updates on every sign-in event.
• Granular Policy Targeting: Old policies could only target user risk or sign-in risk globally. Now, you can set conditions by session, app, or even custom risk providers.
• Greater Transparency: The new portal blades show why a risk score was assigned—”impossible travel from Paris to Tokyo within 2 minutes”—not just a ‘medium risk’ tag.
• Reduced False Positives: Security Copilot’s context awareness means fewer unnecessary MFA prompts, improving user experience without sacrificing security.

For most enterprises, this translates to less friction, more accurate threat detection, and fewer compromised sessions slipping through static controls.

Step-by-Step Implementation: Deploying Adaptive Authentication in Entra ID

1. Confirm Licensing and Tenant Readiness

Adaptive authentication requires Entra ID Premium P2. Check your tenant’s SKU:

Get-MgSubscribedSku | Where-Object {$_.SkuPartNumber -like '*P2*'}

If you don’t see an Entra ID P2 SKU, you’ll need to upgrade before these features appear.

2. Enable Adaptive Risk Policies

In Entra portal:

1. Navigate to Entra ID > Protection > Conditional Access.
2. Create a new policy. Under Conditions, select Adaptive Risk (not just User or Sign-in risk).
3. Set controls—require Multi-factor Authentication, Password Reset, or Block Access based on risk level.
4. Apply to sensitive groups (e.g., privileged admins, high-value business apps).

Example: To require MFA only when Copilot flags a session as high-risk (even if previous risk signals are low):

{
  "if": {
    "adaptiveRisk": "high"
  },
  "then": {
    "grant": ["mfa"]
  }
}

3. Monitor and Tune Signals

Go to Entra ID > Protection > Risky Users and Risky Sign-ins. You’ll see new Copilot-powered explanations under each event. Track false positives—if users are prompted for MFA too often, adjust your thresholds or exclude less sensitive apps.

4. Integrate with Defender and Sentinel

If you run Microsoft Defender for Identity or Sentinel, link them to Entra ID so threat signals feed into the adaptive engine. Start with:

Connect-MgGraph -Scopes "IdentityRisk.Read.All","SecurityEvents.Read.All"

This ensures that alerts about compromised devices or lateral movement are part of Entra’s risk calculus.

Top Mistakes to Avoid

1. Not Reviewing Licensing: Adaptive authentication is P2-only. Many orgs assume risk signals are available with E3 or P1—incorrect.

2. Overly Broad Policies: Applying adaptive risk controls tenant-wide can cause excessive MFA prompts. Start with pilot groups.

3. Ignoring Signal Sources: If Defender or Sentinel aren’t integrated, Copilot’s risk model is less effective.

4. Not Monitoring False Positives: AI-driven risk signals are powerful but imperfect. Regularly review event logs to tune sensitivity.

Expert Insights: Zero Trust in Practice

Zero Trust isn’t a product—it’s a strategy. With adaptive authentication, Microsoft is bringing risk-based access closer to reality. Security architects should:

• Map high-risk workflows (privileged admin activity, finance apps) to adaptive policies.
• Test risk signals with real users before rolling out tenant-wide.
• Keep an eye on roadmap features—especially Unified Risk Engine, which will enable per-app and guest controls by late 2024.

Practitioners report that false positives are lower, but user education is crucial. If users are prompted for MFA unexpectedly, explain why risk-adaptive controls matter.

Practical Takeaway: Secure Your Entra ID Tenant—Now and Next

The new adaptive authentication features in Entra ID represent a genuine leap in Zero Trust maturity. Enterprises with P2 can start implementing risk-based Conditional Access today—and should prepare for even finer-grained controls as Microsoft’s roadmap unfolds. Begin by piloting adaptive policies for privileged users, integrate Defender/Sentinel signals, and monitor for tuning opportunities. Stay close to Microsoft’s Security Blog for roadmap updates, and don’t let licensing or configuration gaps undermine your security posture.