You are building an Azure Logic App that must call a third-party REST API secured with OAuth 2.0 Client Credentials flow. The client ID and client secret are stored in Azure Key Vault. You need to securely obtain an access token and include it in requests to the API. Which approach should you use in the Logic App?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
Distractor review
Use the HTTP action with 'Active Directory OAuth' authentication and hardcode the client secret in the connection parameters.
Hardcoding secrets directly in the workflow definition or connection parameters exposes them in plaintext and violates security best practices.
Distractor review
Create an Azure API connection (custom connector) with the OAuth 2.0 settings and store the secret in the connector's definition.
While custom connectors store secrets securely in Azure, they still require the secret to be provided during creation. The secret would be managed outside Key Vault, adding complexity.
Best answer
Enable a system-assigned managed identity for the Logic App, grant it access to Key Vault, use the 'Get secret' action to retrieve the client secret into a variable, then use the HTTP action with 'Active Directory OAuth' authentication referencing that variable for the secret.
This approach uses managed identity to securely access Key Vault, and the secret is passed at runtime without being exposed in the workflow definition. The HTTP action's OAuth authentication can use a variable for the client secret.
Distractor review
Store the client secret in an Azure App Service application setting and reference it in the Logic App via a connector.
Logic Apps do not directly reference App Service application settings. Additionally, this would require the secret to be stored outside Key Vault, reducing security.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
Related practice questions
Related AZ-204 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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FAQ
Questions learners often ask
What does this AZ-204 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Enable a system-assigned managed identity for the Logic App, grant it access to Key Vault, use the 'Get secret' action to retrieve the client secret into a variable, then use the HTTP action with 'Active Directory OAuth' authentication referencing that variable for the secret. — The recommended approach is to use a managed identity for the Logic App, grant it 'Get' access to the Key Vault secrets, and then use the Azure Key Vault connector's 'Get secret' action to retrieve the client secret. Then, configure the 'HTTP' action with 'Active Directory OAuth' authentication, specifying the client ID and the secret variable. This avoids storing secrets in code or workflow definitions.
What should I do if I get this AZ-204 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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