The answer is the Azure Instance Metadata Service (IMDS) endpoint at http://169.254.169.254/metadata/identity/oauth2/token with the resource parameter set to https://vault.azure.net and api-version 2018-02-01. This is correct because managed identities in Azure use the IMDS, a well-known non-routable IP address, to obtain OAuth 2.0 access tokens without storing any credentials in code. The resource parameter specifies the target service—Key Vault in this case—so the token is scoped for vault.azure.net. On the AZ-204 exam, this question tests your understanding of how to authenticate Azure resources to Key Vault using system-assigned identities, often appearing alongside traps like the Azure CLI login endpoint or the ARM token endpoint. A common mistake is confusing the IMDS token endpoint with the App Service identity endpoint, but the IMDS is the universal fallback for all Azure compute services. Memory tip: think of 169.254.169.254 as the “magic IP” for Azure metadata—just add /metadata/identity/oauth2/token and the correct resource to get your Key Vault token.
AZ-204 Practice Question: Connect to and consume Azure services and third-party services
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 a web app that uses Azure Key Vault to retrieve secrets. The app must authenticate using a system-assigned managed identity. Which endpoint should you use to get an access token for Key Vault?
The correct endpoint for getting a token via managed identity on Azure App Service is http://169.254.169.254/metadata/identity/oauth2/token (the Instance Metadata Service endpoint). Option A is the Azure CLI login endpoint, B is the Graph API token endpoint, and D is the ARM token endpoint, which do not use managed identity for Key Vault.
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.
This is the ARM endpoint for Key Vault resource, not for token acquisition.
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https://graph.microsoft.com/v1.0/me
Why it's wrong here
This is a Microsoft Graph endpoint for user data, not for token acquisition.
Common exam traps
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.
Detailed technical explanation
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.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Identify which AZ-204 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: http://169.254.169.254/metadata/identity/oauth2/token?resource=https://vault.azure.net&api-version=2018-02-01 — The correct endpoint for getting a token via managed identity on Azure App Service is http://169.254.169.254/metadata/identity/oauth2/token (the Instance Metadata Service endpoint). Option A is the Azure CLI login endpoint, B is the Graph API token endpoint, and D is the ARM token endpoint, which do not use managed identity for Key Vault.
What should I do if I get this AZ-204 question wrong?
Identify which AZ-204 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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