This SC-100 practice question tests your understanding of design security operations, identity, and compliance capabilities. 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 needs to monitor and respond to threats across email, endpoints, and identities. Which Microsoft solution provides a unified incident response experience?
Microsoft Purview
Why wrong: Purview is for data governance.
Microsoft Intune
Why wrong: Intune is for device management.
Microsoft Defender XDR
Defender XDR unifies incidents across domains.
Microsoft Sentinel
Why wrong: Sentinel is a SIEM, not XDR.
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 (Extended Detection and Response) is the correct choice because it provides a unified incident response experience by correlating alerts and signals from email (Defender for Office 365), endpoints (Defender for Endpoint), and identities (Defender for Identity) into a single incident queue. This cross-domain correlation enables security teams to investigate and remediate complex multi-stage attacks from a single pane of glass, rather than switching between separate consoles.
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 Purview
Why it's wrong here
Purview is for data governance.
Microsoft Intune
Why it's wrong here
Intune is for device management.
Microsoft Defender XDR
Why this is correct
Defender XDR unifies incidents across domains.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Sentinel
Why it's wrong here
Sentinel is a SIEM, not XDR.
Common exam traps
The trap here is that candidates often confuse Microsoft Sentinel (a SIEM) with Microsoft Defender XDR (an XDR), but Sentinel ingests logs and requires manual or KQL-based correlation, while Defender XDR provides automatic cross-domain incident correlation out of the box for Microsoft security signals.
Detailed technical explanation
Under the hood, Microsoft Defender XDR uses a shared data lake and automated correlation engine that ingests signals from Defender for Endpoint (using the Microsoft Defender Antivirus and endpoint detection sensors), Defender for Office 365 (using Exchange Online Protection and Safe Links/Attachments), and Defender for Identity (using Active Directory signals and network traffic analysis via the Azure ATP sensor). When a user clicks a malicious link in an email, Defender XDR automatically correlates that with a subsequent credential theft attempt on an endpoint and an anomalous sign-in from a different identity, creating a single incident with all related alerts and evidence. In a real-world scenario, this unified view reduces mean time to respond (MTTR) from hours to minutes by eliminating the need for manual cross-console pivoting.
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 security operations, identity, and compliance capabilities — This question tests Design security operations, identity, and compliance capabilities — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Defender XDR — Microsoft Defender XDR (Extended Detection and Response) is the correct choice because it provides a unified incident response experience by correlating alerts and signals from email (Defender for Office 365), endpoints (Defender for Endpoint), and identities (Defender for Identity) into a single incident queue. This cross-domain correlation enables security teams to investigate and remediate complex multi-stage attacks from a single pane of glass, rather than switching between separate consoles.
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
This SC-100 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-100 exam.
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