How does Microsoft’s Zero Trust security model integrate with Entra ID, Conditional Access, and Defender for Cloud Apps to ensure both identity protection and continuous access evaluation, especially in hybrid or multi-cloud environments?

Question

How does Microsoft’s Zero Trust security model integrate with Entra ID, Conditional Access, and Defender for Cloud Apps to ensure both identity protection and continuous access evaluation, especially in hybrid or multi-cloud environments?

Brevin Kibet 20

Given that our hospital runs a hybrid environment with both on-prem AD and Entra ID, and staff frequently access sensitive patient data via Teams, Epic, and other SaaS apps, how can Microsoft’s Zero Trust framework specifically Conditional Access policies, Entra ID Continuous Access Evaluation, and Defender for Cloud Apps be combined to both protect identities and enforce real-time risk-based access without disrupting critical care operations?

Anonymous

2025-09-09T07:56:25.1166667+00:00

Hello Brevin Kibet,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
I got that you are implementing Zero Trust, which verify every request (identity or device), enforce least privilege access policies through Conditional Access, reassess permissions continuously using Continuous Access Evaluation (CAE) and, monitor and control user sessions in real time using Defender for Cloud Apps (CASB), even mid-session. You’re aiming for dynamic, secure access across on-premises and cloud environments.

Before we can proceed further, want to know below scenarios, kindly provide these information so that we can clarify your queries more effectively.
Are staff devices managed (e.g., Intune) or unmanaged?

Do you use Application Proxy for on-prem apps like Epic?

Do users often switch networks (home vs hospital)?

Do you already use Entra ID CA policies, Intune, Defender for Endpoint, or Sentinel?

Regards,

Monalisha
Carolyne-3676 1,136 Reputation points

2025-09-09T15:09:27.2566667+00:00

As Jena provides a detailed overview based on your scenarios want to highlight that these tools enable adaptive access, risk-based enforcement, and continuous monitoring
Specifically:
 Entra ID Conditional Access: Enforces contextual access policies based on user risk, device compliance, location, and app sensitivity. It blocks or restricts access dynamically, ensuring only trusted users and devices can access sensitive data.

 Continuous Access Evaluation (CAE): Enables near real-time revocation of access tokens when risk conditions change (e.g., stolen credentials or risky sign-ins). [Secure app...Evaluation] & https://learn.microsoft.com/en-us/entra/identity/conditional-access/concept-continuous-access-evaluation#scenarios

 Defender for Cloud Apps: Provides deep visibility into SaaS usage, applies session controls, and detects anomalies. It integrates with Conditional Access to enforce granular, in-session policies for apps like Epic and Teams

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Anonymous

2025-09-09T07:56:25.1166667+00:00

Hello Brevin Kibet,

Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
I got that you are implementing Zero Trust, which verify every request (identity or device), enforce least privilege access policies through Conditional Access, reassess permissions continuously using Continuous Access Evaluation (CAE) and, monitor and control user sessions in real time using Defender for Cloud Apps (CASB), even mid-session. You’re aiming for dynamic, secure access across on-premises and cloud environments.

Before we can proceed further, want to know below scenarios, kindly provide these information so that we can clarify your queries more effectively.
Are staff devices managed (e.g., Intune) or unmanaged?

Do you use Application Proxy for on-prem apps like Epic?

Do users often switch networks (home vs hospital)?

Do you already use Entra ID CA policies, Intune, Defender for Endpoint, or Sentinel?

Regards,

Monalisha
Carolyne-3676 1,136 Reputation points

2025-09-09T15:09:27.2566667+00:00

As Jena provides a detailed overview based on your scenarios want to highlight that these tools enable adaptive access, risk-based enforcement, and continuous monitoring
Specifically:
 Entra ID Conditional Access: Enforces contextual access policies based on user risk, device compliance, location, and app sensitivity. It blocks or restricts access dynamically, ensuring only trusted users and devices can access sensitive data.

 Continuous Access Evaluation (CAE): Enables near real-time revocation of access tokens when risk conditions change (e.g., stolen credentials or risky sign-ins). [Secure app...Evaluation] & https://learn.microsoft.com/en-us/entra/identity/conditional-access/concept-continuous-access-evaluation#scenarios

 Defender for Cloud Apps: Provides deep visibility into SaaS usage, applies session controls, and detects anomalies. It integrates with Conditional Access to enforce granular, in-session policies for apps like Epic and Teams

Answer 1

Hello Brevin Kibet,
Thank you for your response with extra information.
You wanted to know how Microsoft’s Zero Trust security model integrates with Entra ID, Conditional Access, and Defender for Cloud Apps to protect identities and enforce continuous access evaluation especially in hybrid healthcare environments like yours, where staff access sensitive patient data via Teams, Epic, and other SaaS apps from both managed and unmanaged devices.

Based on your hospital’s setup and the tools you currently use (Entra ID Conditional Access and Intune, with Defender for Endpoint and Sentinel under evaluation), I will try to give you solution which aligns with Microsoft’s Zero Trust principles and includes authoritative documentation links for each component.
Zero Trust Integration Strategy for Hybrid Healthcare;

Identity Protection with Entra ID + Conditional Access

Microsoft Entra ID acts as the identity control plane and conditional Access policies enforce contextual access decisions based on: User risk (e.g., leaked credentials), Sign-in risk (e.g., unfamiliar location), Device compliance (via Intune), Network location (home vs hospital).

For unmanaged devices (e.g., external staff), you can enforce browser-only access and block native clients using Conditional Access App Control.

more at: https://learn.microsoft.com/en-us/entra/identity/conditional-access/plan-conditional-access

https://learn.microsoft.com/en-us/entra/identity/conditional-access/overview

Continuous Access Evaluation (CAE)

CAE allows real-time enforcement of access policies even mid-session. For example, if your risk level changes or you move to an untrusted network, access can be revoked instantly without waiting for token expiration. CAE works seamlessly with: Microsoft Teams, SharePoint, Exchange Online and Defender for Cloud Apps.

more at: https://learn.microsoft.com/en-us/security/zero-trust/zero-trust-identity-device-access-policies-overview

Session Control with Defender for Cloud Apps (CASB)

you can use Defender for Cloud Apps which enables: Real-time session monitoring, Policy enforcement for risky behavior, Blocking downloads or uploads from unmanaged devices and App discovery and shadow IT control

You can apply Conditional Access App Control to enforce these policies for SaaS apps like Epic (via Application Proxy), Teams, and others.
reference for better understanding: https://learn.microsoft.com/en-us/defender-cloud-apps/conditional-access-app-control-how-to-overview

https://learn.microsoft.com/en-us/defender-cloud-apps/conditional-access-app-control-identity

Secure Access to On-Prem Apps (Epic)

Since you use Application Proxy for Epic, integrate it with Conditional Access to enforce Zero Trust policies for on-prem apps. This replaces traditional VPN with modern, secure access.

https://learn.microsoft.com/en-us/defender-cloud-apps/proxy-intro-aad

You can follow this roadmap for implementing Microsoft’s Zero Trust security model in your hybrid healthcare environment:

Segment your access policies for managed vs unmanaged devices.

Enable CAE for supported apps to enforce real-time access decisions.

you can deploy Defender for Cloud Apps for session control and app governance.

Integrate Application Proxy with Conditional Access for Epic and other on-prem apps.

Evaluate Defender for Endpoint and Sentinel to extend Zero Trust to endpoint and SIEM layers.

Hope this helps to clarify your queries.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. This will help us and others in the community as well.
Regards,
Monalisha

Anonymous

2025-09-11T03:26:39.2933333+00:00

Hi Brevin Kibet,

Just checking if you have checked the above solution, if this answers your query, do click Accept Answer and Yes for was this answer helpful.

Answer 2

Brevin Kibet 20

Hello Monalisha,

Staff devices: A mix of managed via Intune and some unmanaged devices, mostly for external/contract staff.
Application Proxy: Yes, we use Application Proxy for some on-prem apps like Epic / No, not yet implemented.
Network switching: Yes, users frequently switch between home networks and hospital networks.
Current tools in place: We currently use Entra ID Conditional Access policies and Intune. We’re evaluating Defender for Endpoint, and Sentinel is under consideration for SIEM.

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How does Microsoft’s Zero Trust security model integrate with Entra ID, Conditional Access, and Defender for Cloud Apps to ensure both identity protection and continuous access evaluation, especially in hybrid or multi-cloud environments?

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