- A
Add custom claims to the token via Microsoft Entra ID custom claims policies
Why wrong: Custom claims policies are static and based on directory attributes; they cannot retrieve dynamic roles from an application database.
- B
Implement a custom authorization filter that reads the user's roles from the database on each request and caches them
Why wrong: While this works for specific endpoints, it does not add the roles to the User principal globally, making it inconsistent for all authorization checks.
- C
Use Microsoft Entra ID app roles and assign them to users or groups
Why wrong: App roles are static and require manual assignment in Microsoft Entra ID, not dynamic from a database.
- D
Use a custom middleware to modify the User principal after authentication, adding role claims from the database
This adds role claims to the principal early in the pipeline, supports caching, and makes the roles available for all authorization policies without altering the authentication flow.
Quick Answer
The correct approach is to use custom middleware that modifies the User principal after authentication by adding role claims from the database. This works because Microsoft.Identity.Web handles authentication with Microsoft Entra ID, but custom roles like "Editor" and "Reviewer" stored in your application database are not part of the Entra ID token. By inserting middleware after the authentication middleware, you can query the database once per session, add the role claims to the principal, and cache them—avoiding repeated database lookups on every request and minimizing performance impact. On the AZ-204 exam, this scenario tests your understanding of the ASP.NET Core authentication pipeline and the separation between authentication (who you are) and authorization (what you can do). A common trap is trying to modify the token itself or using app roles in Entra ID, which would require changing the authentication flow. Memory tip: think "post-auth enrichment"—the middleware enriches the principal after authentication, not before.
AZ-204 Implement Azure security Practice Question
This AZ-204 practice question tests your understanding of implement azure security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are developing an ASP.NET Core web API that uses Microsoft Entra ID for authentication via Microsoft.Identity.Web. The application needs to authorize actions based on custom roles such as "Editor" and "Reviewer". These roles are not defined in Microsoft Entra ID app roles or directory roles; instead, they are stored in an application database and can be assigned dynamically by administrators. You need to implement authorization with minimal impact on performance and without modifying the application's authentication flow. Which approach should you use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use a custom middleware to modify the User principal after authentication, adding role claims from the database
Option D is correct because it allows you to add role claims from the application database to the User principal after authentication via custom middleware, without altering the authentication flow. This approach leverages the existing Microsoft.Identity.Web authentication pipeline and caches the role claims in the principal, minimizing performance impact by avoiding repeated database lookups on every request.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add custom claims to the token via Microsoft Entra ID custom claims policies
Why it's wrong here
Custom claims policies are static and based on directory attributes; they cannot retrieve dynamic roles from an application database.
- ✗
Implement a custom authorization filter that reads the user's roles from the database on each request and caches them
Why it's wrong here
While this works for specific endpoints, it does not add the roles to the User principal globally, making it inconsistent for all authorization checks.
- ✗
Use Microsoft Entra ID app roles and assign them to users or groups
Why it's wrong here
App roles are static and require manual assignment in Microsoft Entra ID, not dynamic from a database.
- ✓
Use a custom middleware to modify the User principal after authentication, adding role claims from the database
Why this is correct
This adds role claims to the principal early in the pipeline, supports caching, and makes the roles available for all authorization policies without altering the authentication flow.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse custom middleware with authorization filters, assuming both run at the same point in the pipeline, but middleware modifies the principal before authorization runs, while filters run after authentication and can cause redundant database calls if not designed carefully.
Detailed technical explanation
How to think about this question
Under the hood, the custom middleware in option D runs after the authentication middleware (which populates the User principal with Entra ID claims) and before the authorization middleware. It queries the database for the user's roles, adds them as claims (e.g., 'role' claim with values 'Editor' or 'Reviewer'), and stores them in the HttpContext.User. This approach leverages the ClaimsPrincipal's built-in caching within the request pipeline, so subsequent authorization checks (e.g., [Authorize(Roles = "Editor")]) use the enriched principal without additional database hits. In real-world scenarios, this pattern is common for multi-tenant SaaS applications where roles are managed per tenant in a database and cannot be defined in Entra ID.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-204 question test?
Implement Azure security — This question tests Implement Azure security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a custom middleware to modify the User principal after authentication, adding role claims from the database — Option D is correct because it allows you to add role claims from the application database to the User principal after authentication via custom middleware, without altering the authentication flow. This approach leverages the existing Microsoft.Identity.Web authentication pipeline and caches the role claims in the principal, minimizing performance impact by avoiding repeated database lookups on every request.
What should I do if I get this AZ-204 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
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