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You are building an Azure Logic App that must send email notifications via Office 365 when a new order is placed. You need to securely store the Office 365 credentials and reference them in the Logic App. Which approach should you use?

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You are building an Azure Logic App that must send email notifications via Office 365 when a new order is placed. You need to securely store the Office 365 credentials and reference them in the Logic App. Which approach should you use?

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.

A

Distractor review

Store the credentials in a variable within the Logic App designer

Storing credentials directly in the Logic App definition exposes them as plain text and is not secure.

B

Distractor review

Use an Azure Key Vault action with a connection that uses a username and password

While Key Vault stores secrets securely, connecting to it with a username/password still requires storing those credentials somewhere, which is not secure.

C

Best answer

Use an Azure Key Vault connector with a managed identity assigned to the Logic App

The managed identity authenticates to Key Vault without any stored credentials, allowing the Logic App to retrieve the Office 365 credentials securely at runtime.

D

Distractor review

Store the credentials in an Azure Storage table and fetch them in the Logic App

Azure Storage tables are not designed for secure secret storage and should not be used for credentials.

Common exam trap

Common exam trap: NAT rules depend on direction and matching traffic

NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.

Technical deep dive

How to think about this question

NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.

KKey Concepts to Remember

  • Static NAT maps one inside address to one outside address.
  • PAT allows many inside hosts to share one public address using ports.
  • Inside local and inside global describe the private and translated addresses.
  • NAT ACLs identify traffic for translation, not always security filtering.

TExam Day Tips

  • Identify inside and outside interfaces first.
  • Check whether the scenario needs static NAT, dynamic NAT or PAT.
  • Do not confuse NAT matching ACLs with normal packet-filtering intent.

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.

More questions from this exam

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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Question 4

You are developing a web app that authenticates users via Microsoft Entra ID. The app needs to read the user's profile and send emails on their behalf. You want to minimize user consent prompts. Which OAuth 2.0 grant type should you use?

Question 5

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Question 6

You are monitoring an Azure App Service using Application Insights. You notice that the server response time is high for certain requests. You need to drill down to see which external dependencies (like databases or APIs) are causing the delay. Which Application Insights feature should you use?

FAQ

Questions learners often ask

What does this AZ-204 question test?

Static NAT maps one inside address to one outside address.

What is the correct answer to this question?

The correct answer is: Use an Azure Key Vault connector with a managed identity assigned to the Logic App — Using a managed identity is the recommended and most secure approach for an Azure Logic App to access resources like Azure Key Vault. The Logic App gets its own identity, which you can grant read permissions to Key Vault secrets. The Office 365 credentials can be stored as a secret in Key Vault. During runtime, the Logic App retrieves the secret using the managed identity. Storing credentials directly in the Logic App code or in Azure Storage is insecure. Using a Key Vault action without managed identity would still require authentication; managed identity eliminates the need to store credentials.

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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