This SC-100 practice question tests your understanding of design solutions that align with security best practices and priorities. 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 TWO Microsoft security solutions should be integrated to provide a comprehensive Zero Trust architecture that includes identity protection, endpoint detection, and response? (Select exactly two correct options.)
Microsoft 365 E5
Why wrong: E5 is a license, not a security solution.
Microsoft Defender XDR
Provides endpoint detection and response across domains.
Microsoft Entra ID
Provides identity protection and conditional access.
Microsoft Sentinel
Why wrong: Sentinel is a SIEM, not a foundational Zero Trust component.
Microsoft Purview
Why wrong: Purview is for data governance, not Zero Trust core.
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 XDR
Microsoft Defender XDR (B) is correct because it provides unified endpoint detection and response (EDR) across devices, email, and identities, integrating signals from Microsoft Defender for Endpoint, Defender for Office 365, and Defender for Identity. Microsoft Entra ID (C) is correct because it delivers identity protection through Conditional Access, risk-based policies, and identity governance, forming the identity pillar of a Zero Trust architecture. Together, they cover identity protection and endpoint detection/response, two core Zero Trust components.
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 365 E5
Why it's wrong here
E5 is a license, not a security solution.
Microsoft Defender XDR
Why this is correct
Provides endpoint detection and response across domains.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Entra ID
Why this is correct
Provides identity protection and conditional access.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Sentinel
Why it's wrong here
Sentinel is a SIEM, not a foundational Zero Trust component.
Microsoft Purview
Why it's wrong here
Purview is for data governance, not Zero Trust core.
Common exam traps
The trap here is that candidates often confuse Microsoft 365 E5 (a licensing bundle) with a specific security solution, or they mistakenly think Microsoft Sentinel (a SIEM) fulfills the endpoint detection requirement, when in fact Sentinel is for log analysis and not for real-time endpoint detection and response.
Detailed technical explanation
Under the hood, Microsoft Defender XDR correlates signals from multiple Defender components using a shared data lake and automated investigation engine (e.g., using the Microsoft 365 Defender APIs and the Advanced Hunting schema). Microsoft Entra ID integrates with Defender XDR via the Microsoft Graph security API, enabling risk-based Conditional Access policies that can block or isolate compromised endpoints in real time. In a real-world scenario, if Defender for Endpoint detects a ransomware process on a device, it can trigger an Entra ID Conditional Access policy to revoke the user's tokens and block further access, demonstrating the Zero Trust principle of 'never trust, always verify'.
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
Design solutions that align with security best practices and priorities — This question tests Design solutions that align with security best practices and priorities — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Defender XDR — Microsoft Defender XDR (B) is correct because it provides unified endpoint detection and response (EDR) across devices, email, and identities, integrating signals from Microsoft Defender for Endpoint, Defender for Office 365, and Defender for Identity. Microsoft Entra ID (C) is correct because it delivers identity protection through Conditional Access, risk-based policies, and identity governance, forming the identity pillar of a Zero Trust architecture. Together, they cover identity protection and endpoint detection/response, two core Zero Trust components.
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 24, 2026
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