The answer is that the WDAC policy is in enforce mode and does not trust the custom indicator. When you create a custom indicator to allow an application by its certificate thumbprint, Defender for Endpoint sends that allow action to the device, but Windows Defender Application Control (WDAC) only honors it if the WDAC policy itself trusts the indicator source. In enforce mode, WDAC ignores the indicator unless you have explicitly configured the policy to allow indicators or switched WDAC to audit mode, which is why the application remains blocked. On the MS-102 exam, this question tests your understanding of the trust hierarchy between WDAC and Microsoft Defender for Endpoint indicators—a common trap is assuming that a custom indicator automatically overrides any WDAC rule. Remember the key distinction: WDAC must trust the indicator for the allow to work; otherwise, enforce mode wins. A useful memory tip is “Trust before Allow”—if WDAC doesn’t trust the indicator, the block stands.
MS-102 Practice Question: Manage security and threats by using Microsoft Defender XDR
This MS-102 practice question tests your understanding of manage security and threats by using microsoft defender xdr. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An organization uses Microsoft Defender for Endpoint and wants to allow only certain applications to run on managed devices. They create a custom indicator (IoA) to allow a specific application by its certificate thumbprint. However, after deployment, the application is still blocked by default Windows Defender Application Control (WDAC) policy. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The WDAC policy is in enforce mode and does not trust the indicator.
Custom indicators for allow are prioritized over WDAC only if the WDAC policy trusts the indicator. However, by default, WDAC does not automatically trust Defender for Endpoint indicators; you must configure WDAC to allow indicators or use a WDAC policy that is in audit mode. Option D is correct. Option A is wrong because indicators do work with WDAC. Option B is wrong because certificate thumbprint is a valid indicator. Option C is wrong because the indicator does not expire quickly.
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.
✗
The indicator is not yet active due to propagation delay.
Why it's wrong here
Propagation delay is usually short.
✗
The certificate thumbprint is incorrect.
Why it's wrong here
Assuming it is correct, this is not the issue.
✓
The WDAC policy is in enforce mode and does not trust the indicator.
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Custom indicators cannot override WDAC policies.
Why it's wrong here
Indicators can override WDAC if configured properly.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 question in full detail.
Identify which MS-102 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.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The WDAC policy is in enforce mode and does not trust the indicator. — Custom indicators for allow are prioritized over WDAC only if the WDAC policy trusts the indicator. However, by default, WDAC does not automatically trust Defender for Endpoint indicators; you must configure WDAC to allow indicators or use a WDAC policy that is in audit mode. Option D is correct. Option A is wrong because indicators do work with WDAC. Option B is wrong because certificate thumbprint is a valid indicator. Option C is wrong because the indicator does not expire quickly.
What should I do if I get this MS-102 question wrong?
Identify which MS-102 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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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