Quick Answer
The correct answer is Microsoft Defender for Endpoint, Microsoft Defender for Office 365, and Microsoft Defender for Identity. These three components form the core of the unified security operations platform because Microsoft Defender XDR is designed to natively integrate endpoint, email and collaboration, and identity signals into a single, correlated incident view. On the SC-900 exam, this question tests your understanding of how Microsoft’s extended detection and response strategy consolidates specific security domains, deliberately excluding Defender for Cloud and Defender for IoT from the core XDR bundle. A common trap is assuming all “Defender” products are part of XDR, but only these three are directly stitched together in the unified platform. To remember, use the mnemonic “E-I-O” for Endpoint, Identity, and Office 365—the trio that powers the XDR story.
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.
Which THREE Microsoft Defender XDR components are included in the unified security operations platform? (Select three.)
Microsoft Defender for Office 365
Email and collaboration protection is included.
Microsoft Defender for Cloud
Why wrong: Defender for Cloud is a separate cloud security solution.
Microsoft Defender for Identity
Identity security is part of Defender XDR.
Microsoft Defender for Endpoint
Endpoint protection is a core component.
Microsoft Defender for IoT
Why wrong: Defender for IoT is not part of the core XDR platform.
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
Defender for Endpoint, for Office 365, and for Identity are part of Defender XDR. Defender for Cloud (Option D) is separate. Defender for IoT (Option E) is not included in the core XDR platform.
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
Email and collaboration protection is included.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Defender for Cloud
Why it's wrong here
Defender for Cloud is a separate cloud security solution.
Microsoft Defender for Identity
Why this is correct
Identity security is part of Defender XDR.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Defender for Endpoint
Why this is correct
Endpoint protection is a core component.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Defender for IoT
Why it's wrong here
Defender for IoT is not part of the core XDR platform.
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 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
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: Microsoft Defender for Office 365 — Defender for Endpoint, for Office 365, and for Identity are part of Defender XDR. Defender for Cloud (Option D) is separate. Defender for IoT (Option E) is not included in the core XDR platform.
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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