SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
You work at a mid-sized company that uses Microsoft Defender for Business (a subscription included with Microsoft 365 Business Premium). The company has 300 devices enrolled in Microsoft Intune. Recently, a malware outbreak occurred on several devices. You need to implement a solution that automatically remediates devices that are found to be infected with malware. The solution should isolate the device from the network and run a full scan. Which action should you take?
⚠ Common exam trap
SC-900 often tests the confusion between access-blocking controls (Conditional Access, compliance policies) and actual remediation capabilities (AIR), so candidates pick a policy that only restricts access.
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
✓
Enable automatic investigation and remediation in Microsoft Defender for Business.
Microsoft Defender for Business includes automated investigation and remediation (AIR), which can automatically isolate an infected device and trigger a full antivirus scan based on the investigation verdict. Enabling AIR is the only option that provides automatic remediation actions rather than just detection or access blocking. Conditional Access and compliance policies restrict access but do not remediate the device itself.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a Conditional Access policy to block access for devices with malware.
Why it's wrong here
Conditional Access policies control access to resources based on conditions but do not perform automatic remediation actions like isolation or scanning.
- ✗
Create an Intune compliance policy to mark devices as non-compliant if malware is detected.
Why it's wrong here
Intune compliance policies can mark devices as non-compliant but do not automatically remediate malware or isolate the device.
- ✓
Enable automatic investigation and remediation in Microsoft Defender for Business.
Why this is correct
Automated investigation and remediation in Microsoft Defender for Business triggers response actions such as isolating infected devices and initiating full antivirus scans without manual intervention, directly satisfying the requirement for automatic malware remediation across the 300 Intune-enrolled devices.
- ✗
Configure Microsoft Defender Antivirus to run a weekly scan.
Why it's wrong here
Configuring Microsoft Defender Antivirus to run a weekly scan is a scheduled task, not an automatic response to a malware outbreak.
Go deeper
Related to this question
Learn chapter
Microsoft Defender for Cloud
Key term
Malware
Malware is any software intentionally designed to cause damage, disrupt operations, steal data, or gain unauthorized access to computer systems.
Key term
Compliance
Compliance is the process of ensuring that an organization follows laws, regulations, standards, and internal policies that apply to its operations and data handling.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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.