This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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.
An administrator is reviewing a request from users who need to protect users from phishing, unsafe links, and malicious attachments. Microsoft security, identity, or compliance capability should it use?
Microsoft Defender for Office 365
Defender for Office 365 provides advanced protection for email and collaboration threats.
Microsoft Stream
Why wrong: Stream hosts video content and does not meet this requirement.
Microsoft Forms
Why wrong: Forms creates surveys and quizzes, not this security or compliance capability.
Microsoft Planner
Why wrong: Planner manages tasks and does not provide this security or compliance control.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Microsoft Defender for Office 365
Microsoft Defender for Office 365 is the correct choice because it provides advanced threat protection specifically designed to safeguard users against phishing, unsafe links, and malicious attachments. It includes features like Safe Links, Safe Attachments, and anti-phishing policies that scan and detonate URLs and attachments in real-time, leveraging threat intelligence from the Microsoft Intelligent Security Graph.
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.
Microsoft Defender for Office 365
Why this is correct
Defender for Office 365 provides advanced protection for email and collaboration threats.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Stream
Why it's wrong here
Stream hosts video content and does not meet this requirement.
Microsoft Forms
Why it's wrong here
Forms creates surveys and quizzes, not this security or compliance capability.
Microsoft Planner
Why it's wrong here
Planner manages tasks and does not provide this security or compliance control.
Common exam traps
The trap here is that candidates may confuse general Microsoft 365 productivity apps (Stream, Forms, Planner) with security services, assuming any Microsoft tool can provide protection, but only Defender for Office 365 is purpose-built for phishing and malware defense.
Detailed technical explanation
Under the hood, Defender for Office 365 uses heuristics, machine learning, and detonation chambers (sandboxing) to analyze links and attachments in email, Teams, and SharePoint. Safe Links proactively rewrites URLs to check against a dynamic block list at click time, while Safe Attachments routes suspicious files through a virtual environment to observe behavior before delivery. In a real-world scenario, if a user receives a link to a credential-harvesting site, Defender for Office 365 would block the click and alert the admin, even if the link was previously unknown.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Defender for Office 365 — Microsoft Defender for Office 365 is the correct choice because it provides advanced threat protection specifically designed to safeguard users against phishing, unsafe links, and malicious attachments. It includes features like Safe Links, Safe Attachments, and anti-phishing policies that scan and detonate URLs and attachments in real-time, leveraging threat intelligence from the Microsoft Intelligent Security Graph.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This MS-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 MS-900 exam.
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