The answer is a Safe Attachments policy. This is correct because Safe Attachments is the Microsoft 365 Defender feature specifically designed to scan email attachments in a virtual sandbox environment before delivery, blocking any malicious files and delaying the email until the scan completes. When configured with the Dynamic Delivery action, the email body is delivered immediately while the attachment is held, scanned, and only released if safe—directly meeting the requirement to delay delivery and block threats. On the MS-102 exam, this question tests your ability to distinguish between Safe Attachments, Safe Links, and anti-malware policies; a common trap is confusing Safe Attachments with the general anti-malware policy, which lacks sandbox scanning. Remember the memory tip: “Sandbox scans attachments; Dynamic Delivery delays the bad stuff.”
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.
A security administrator wants to ensure that all email attachments are scanned in a sandbox environment and blocked if malicious, with email delivery delayed until scanning completes. Which Microsoft 365 Defender policy should the administrator configure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Safe Attachments policy
Safe Attachments policy is the correct choice because it specifically provides time-of-delivery scanning of email attachments in a virtual sandbox environment. When configured with the 'Dynamic Delivery' action, the email body is delivered immediately while the attachment is held and scanned; if the attachment is found malicious, it is blocked and the user is notified. This directly meets the requirement to delay email delivery until scanning completes and block malicious attachments.
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.
✗
Safe Links policy
Why it's wrong here
Safe Links protects against malicious URLs in email and Office documents, not attachments.
✓
Safe Attachments policy
Why this is correct
Safe Attachments scans email attachments in a virtual sandbox and blocks malicious ones, delaying delivery until analysis is complete.
Related concept
Read the scenario before looking for a memorised answer.
✗
Anti-spam policy
Why it's wrong here
Anti-spam policy filters junk email based on content and sender reputation, not attachment scanning.
✗
Anti-phishing policy
Why it's wrong here
Anti-phishing policy protects against impersonation and spoofing, not attachment-based threats.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Safe Attachments with Safe Links, assuming both handle attachments, but Safe Links only handles URLs, not file attachments, and the question explicitly requires sandbox scanning of attachments.
Detailed technical explanation
How to think about this question
Safe Attachments uses the Microsoft Defender for Office 365 detonation engine, which executes attachments in a hypervisor-based sandbox (Windows 10 Enterprise with E5 security features) to observe behavior. The 'Dynamic Delivery' action is key: it sends the email body immediately but replaces the attachment with a placeholder, then delivers the original attachment only after the sandbox verdict is clean. This minimizes user delay while ensuring malicious files are never delivered.
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.
TExam Day Tips
→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.
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: Safe Attachments policy — Safe Attachments policy is the correct choice because it specifically provides time-of-delivery scanning of email attachments in a virtual sandbox environment. When configured with the 'Dynamic Delivery' action, the email body is delivered immediately while the attachment is held and scanned; if the attachment is found malicious, it is blocked and the user is notified. This directly meets the requirement to delay email delivery until scanning completes and block malicious attachments.
What should I do if I get this MS-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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