Quick Answer
The correct answer is the Safe Links policy. This is because Safe Links in Microsoft Defender for Office 365 is specifically designed to investigate link reputation in real time, scanning URLs at the time of click to determine if they lead to malicious or phishing sites. When a user reports a suspicious email that bypassed Exchange Online Protection, Safe Links provides the deep, time-of-click analysis needed to assess the link’s current threat status. On the SC-900 exam, this question tests your understanding of the layered protection in Microsoft Defender XDR, often contrasting Safe Links (for URLs) with Safe Attachments (for files) and anti-phish policies (for email content). A common trap is confusing Safe Links with baseline EOP filtering, but remember: EOP is the first line of defense, while Safe Links is the real-time investigator. Memory tip: Safe Links = Scan Links; Safe Attachments = Scan Attachments.
This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. 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.
Your organization uses Microsoft Defender XDR (formerly Microsoft 365 Defender). A user reports receiving a suspicious email with a link. The email was not blocked by Exchange Online Protection (EOP). Which feature should you use to investigate the link's reputation in real time?
Exchange Online Protection (EOP) filtering
Why wrong: EOP is the default filter; if it didn't block, additional layers are needed.
Anti-phish policy
Why wrong: Anti-phish policies detect phishing but do not provide real-time link reputation.
Safe Attachments policy
Why wrong: Safe Attachments scans attachments, not links.
Safe Links policy
Safe Links protects and allows investigation of URLs in emails.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Safe Links policy
Option B is correct because Safe Links in Defender for Office 365 provides real-time link protection and investigation. Option A is incorrect because Safe Attachments is for file attachments. Option C is incorrect because anti-phish policies handle phishing detection but not link investigation. Option D is incorrect because EOP is the baseline but not for real-time link analysis.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Exchange Online Protection (EOP) filtering
Why it's wrong here
EOP is the default filter; if it didn't block, additional layers are needed.
Anti-phish policy
Why it's wrong here
Anti-phish policies detect phishing but do not provide real-time link reputation.
Safe Attachments policy
Why it's wrong here
Safe Attachments scans attachments, not links.
Safe Links policy
Why this is correct
Safe Links protects and allows investigation of URLs in emails.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which SC-900 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.
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FAQ
Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Safe Links policy — Option B is correct because Safe Links in Defender for Office 365 provides real-time link protection and investigation. Option A is incorrect because Safe Attachments is for file attachments. Option C is incorrect because anti-phish policies handle phishing detection but not link investigation. Option D is incorrect because EOP is the baseline but not for real-time link analysis.
Identify which SC-900 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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
This SC-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-900 exam.
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