The answer is to configure Advanced Delivery for trusted senders from the external domain. This is correct because Advanced Delivery allows you to create a bypass list for specific, verified external senders or domains, ensuring their emails skip the filtering stack and are delivered directly to user inboxes, which directly reduces false positives without weakening the overall security posture for unknown or untrusted senders. On the MS-102 exam, this scenario tests your understanding of how to balance security with usability in Defender for Office 365, often appearing as a trap where candidates mistakenly choose to lower the spam confidence level threshold—which actually increases false negatives—or disable third-party filtering entirely. The key memory tip is “trust the sender, not the domain”: you whitelist specific senders via Advanced Delivery, not an entire external domain, to avoid creating a broad security gap.
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. 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.
Contoso uses Microsoft 365 E5 and has enabled Microsoft Defender for Office 365. Users report that legitimate external emails are being quarantined. You need to reduce false positives without reducing protection. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure Advanced Delivery for trusted senders from the external domain.
Option D is correct because configuring User Mailbox Advanced Delivery allows trusted senders to bypass filtering only for specific domains, reducing false positives while maintaining general protection. Option A is wrong because allowing all senders from the same domain weakens security. Option B is wrong because reducing the spam confidence level threshold increases false negatives. Option C is wrong because disabling third-party email filtering removes necessary protection.
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.
✗
Disable third-party email filtering integration.
Why it's wrong here
This would remove a security layer, not specifically address false positives.
✗
Reduce the Spam Confidence Level (SCL) threshold in anti-spam policies.
Why it's wrong here
Lowering the SCL threshold would let more spam through, increasing false negatives.
✗
Allow all emails from the sender's domain in the Tenant Allow/Block List.
Why it's wrong here
This would allow all emails from the domain, including malicious ones, increasing risk.
✓
Configure Advanced Delivery for trusted senders from the external domain.
Why this is correct
Advanced Delivery allows specific trusted senders to bypass filtering, reducing false positives without compromising overall protection.
Related concept
Read the scenario before looking for a memorised answer.
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: Configure Advanced Delivery for trusted senders from the external domain. — Option D is correct because configuring User Mailbox Advanced Delivery allows trusted senders to bypass filtering only for specific domains, reducing false positives while maintaining general protection. Option A is wrong because allowing all senders from the same domain weakens security. Option B is wrong because reducing the spam confidence level threshold increases false negatives. Option C is wrong because disabling third-party email filtering removes necessary protection.
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.
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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