Question 167 of 985

Describe security, compliance, privacy, and trust in Microsoft 365 →mediumMultiple ChoiceObjective-mapped

Microsoft Defender for Office 365 Plan 2 for Enhanced Anti-Phishing

This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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 user reports receiving a phishing email that bypassed Exchange Online Protection (EOP). What should you configure to add a second layer of defense against sophisticated phishing attacks?

A
Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses
Defender for Office 365 Plan 2 includes advanced anti-phishing, impersonation, and automated investigation.
B
Block all external images in email
Why wrong: This is a privacy feature, not an anti-phishing defense.
C
Enable Safe Attachments in Exchange Online Protection
Why wrong: EOP Safe Attachments is basic; Defender for Office 365 provides advanced protection.
D
Configure DKIM signing for your domain
Why wrong: DKIM authenticates email, but does not add a second layer of defense.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses

Microsoft Defender for Office 365 Plan 2 provides advanced anti-phishing capabilities beyond Exchange Online Protection (EOP), including impersonation protection, machine learning models, and automated investigation and response. Option B (Block all external images) is not a standard anti-phishing measure; it is used for privacy or to prevent tracking but does not analyze the email content for phishing. Option C (Enable Safe Attachments in Exchange Online Protection) is incorrect because Safe Attachments is a feature of Microsoft Defender for Office 365, not available in EOP. Option D (Configure DKIM signing) is an email authentication method that helps verify sender legitimacy but does not add a second layer of defense against sophisticated phishing; it is a foundational security control. Therefore, purchasing and assigning Microsoft Defender for Office 365 Plan 2 licenses is the appropriate action to add a second layer of defense.

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.

✓
Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses
Why this is correct
Defender for Office 365 Plan 2 includes advanced anti-phishing, impersonation, and automated investigation.
Related concept
Read the scenario before looking for a memorised answer.
✗
Block all external images in email
Why it's wrong here
This is a privacy feature, not an anti-phishing defense.
✗
Enable Safe Attachments in Exchange Online Protection
Why it's wrong here
EOP Safe Attachments is basic; Defender for Office 365 provides advanced protection.
✗
Configure DKIM signing for your domain
Why it's wrong here
DKIM authenticates email, but does not add a second layer of defense.

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 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

Got this wrong? Here's your next step.

Identify which MS-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

Questions learners often ask

What does this MS-900 question test?

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..

What is the correct answer to this question?

The correct answer is: Purchase and assign Microsoft Defender for Office 365 Plan 2 licenses — Microsoft Defender for Office 365 Plan 2 provides advanced anti-phishing capabilities beyond Exchange Online Protection (EOP), including impersonation protection, machine learning models, and automated investigation and response. Option B (Block all external images) is not a standard anti-phishing measure; it is used for privacy or to prevent tracking but does not analyze the email content for phishing. Option C (Enable Safe Attachments in Exchange Online Protection) is incorrect because Safe Attachments is a feature of Microsoft Defender for Office 365, not available in EOP. Option D (Configure DKIM signing) is an email authentication method that helps verify sender legitimacy but does not add a second layer of defense against sophisticated phishing; it is a foundational security control. Therefore, purchasing and assigning Microsoft Defender for Office 365 Plan 2 licenses is the appropriate action to add a second layer of defense.

What should I do if I get this MS-900 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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