Configuring App Registrations for Third-Party Authentication in Microsoft Entra ID
Short answer
D Configure an app registration to provide the third-party service with a Client ID and credentials for authenticating to Microsoft Entra ID.
Question
You need to ensure that a third-party cloud service can authenticate to Microsoft Entra.
What should you configure?
Key Takeaways
The question tests the distinction between user-based security controls like Conditional Access and application-based identity management using App Registrations for service principals.
Learn how to allow third-party cloud services to authenticate to Microsoft Entra ID by creating an app registration, which provides the necessary Client ID and permissions.
Common mistake: Candidates often select Conditional Access policy, confusing it with the mechanism that enforces security rules during sign-in rather than the configuration that establishes the application's identity and permissions.
Expert Analysis
To enable a third-party cloud service to authenticate with Microsoft Entra ID (formerly Azure AD), the correct configuration is an app registration (Option D). This process creates a Service Principal within the directory, providing the external application with a unique Client ID and allowing for secure credential management via client secrets or certificates. It also defines the necessary API permissions (either delegated or application) that the service requires to access resources.
The other options are incorrect because they address different authentication scenarios: Conditional Access policies (Option C) are used to enforce security controls, such as requiring MFA or device compliance, for users signing in, not for configuring the identity of the application itself. Multifactor authentication (Option B) is an additional verification step for user accounts and is generally not applicable to non-interactive service-to-service authentication flows. A Microsoft 365 Copilot connector (Option A) is specific to integrating Copilot capabilities with external data sources and does not handle the foundational identity and authentication setup required for general third-party services.
Official Reference
https://learn.microsoft.com/en-us/entra/identity-platform/quickstart-register-app
This link opens the official vendor documentation in a new tab.
Exam Strategy
When asked about enabling non-user entities (like apps or services) to access Microsoft 365 or Entra ID resources, look for 'App Registration' or 'Enterprise Application'. Reserve 'Conditional Access' for questions involving user sign-in requirements, location restrictions, or device compliance checks.
Frequently Asked Questions
What information does an app registration provide to a third-party service?
Can I use Conditional Access to authenticate a third-party app?
Community Votes
100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 2 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 2
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omath 👍 4 Answered DThe correct answer is D. an app registration. Why To allow a third‑party cloud service to authenticate to Microsoft Entra (formerly Azure AD), you must create an app registration. This gives the external service: A client ID A client secret or certificate A defined permission model (delegated or application permissions) A secure way to obtain tokens from Microsoft Entra ID This is the standard method for integrating any external SaaS, automation tool, or custom application with Microsoft 365 services.
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Maria Camila Aristizabal 👍 1 Answered DApp Registration
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