- A
Microsoft Defender for Office 365
Why wrong: Defender for Office 365 protects against threats in email, SharePoint, Microsoft Teams, and OneDrive, but does not monitor third-party cloud apps like Box.
- B
Microsoft Defender for Cloud Apps
Defender for Cloud Apps provides visibility and control over third-party cloud apps, detects anomalies (e.g., impossible travel, mass download), and can automatically suspend users to stop potential data exfiltration.
- C
Microsoft Defender for Identity
Why wrong: Defender for Identity identifies threats in on-premises Active Directory (e.g., pass-the-hash, lateral movement) and does not monitor cloud app activities.
- D
Microsoft Defender for Endpoint
Why wrong: Defender for Endpoint focuses on endpoint devices (desktops, servers, mobile) and does not directly monitor cloud app usage or user behavioral anomalies within third-party SaaS applications.
Quick Answer
The answer is Microsoft Defender for Cloud Apps. This solution is correct because it functions as a Cloud Access Security Broker (CASB) with built-in anomaly detection, using behavioral analytics to identify unusual user activities—such as downloading a large number of files from a third-party app like Box after logging in from an unfamiliar location—and then automatically applying governance actions like suspending the user account via policy-driven responses. On the SC-900 exam, this scenario tests your understanding of how Defender for Cloud Apps provides visibility and control over shadow IT and risky user behavior across SaaS applications, often appearing as a question contrasting it with Microsoft Entra ID (which handles identity-based sign-in risks) or Microsoft Purview (which focuses on data classification and compliance). A common trap is choosing Microsoft Entra ID for user suspension, but remember: Defender for Cloud Apps handles post-authentication activity anomalies within third-party cloud apps, while Entra ID manages pre-authentication sign-in risks. Memory tip: think "Cloud App Anomaly = Defender for Cloud Apps" to link unusual file downloads with automatic user suspension.
SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 security team wants to detect when a user downloads an unusually large number of files from a third-party cloud storage app (e.g., Box) after logging in from an unfamiliar location. They also want to automatically suspend the user's account if such behavior is detected. Which Microsoft security solution should they use?
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
Microsoft Defender for Cloud Apps
Microsoft Defender for Cloud Apps (MDCA) is the correct solution because it provides Cloud Access Security Broker (CASB) capabilities, including anomaly detection for user behavior across third-party cloud apps like Box. It can detect activities such as an unusually large number of file downloads from an unfamiliar location using its built-in behavioral analytics and then automatically apply a governance action, such as suspending the user's account, via policy-driven automated responses.
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.
- ✗
Microsoft Defender for Office 365
Why it's wrong here
Defender for Office 365 protects against threats in email, SharePoint, Microsoft Teams, and OneDrive, but does not monitor third-party cloud apps like Box.
- ✓
Microsoft Defender for Cloud Apps
Why this is correct
Defender for Cloud Apps provides visibility and control over third-party cloud apps, detects anomalies (e.g., impossible travel, mass download), and can automatically suspend users to stop potential data exfiltration.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Microsoft Defender for Identity
Why it's wrong here
Defender for Identity identifies threats in on-premises Active Directory (e.g., pass-the-hash, lateral movement) and does not monitor cloud app activities.
- ✗
Microsoft Defender for Endpoint
Why it's wrong here
Defender for Endpoint focuses on endpoint devices (desktops, servers, mobile) and does not directly monitor cloud app usage or user behavioral anomalies within third-party SaaS applications.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Defender for Cloud Apps with Microsoft Defender for Office 365, assuming that 'cloud apps' only refers to Microsoft 365 services, but MDCA specifically covers third-party SaaS apps like Box, Salesforce, and AWS, while Defender for Office 365 is limited to Microsoft's own collaboration suite.
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Defender for Cloud Apps uses the Cloud App Security API to connect to third-party apps like Box, enabling it to ingest user activity logs (e.g., download events, IP addresses). It applies machine learning-based anomaly detection policies that compare current behavior against a user's baseline, and when a threshold (e.g., 50 downloads in 10 minutes from a new IP) is exceeded, it triggers an automated governance action via the app's API (e.g., calling Box's 'suspend user' endpoint). A subtle behavior is that MDCA can also use risk scores from Microsoft Entra ID (e.g., unfamiliar sign-in properties) to enrich the detection context, reducing false positives.
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.
TExam Day Tips
- 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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
Questions learners often ask
What does this SC-900 question test?
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..
What is the correct answer to this question?
The correct answer is: Microsoft Defender for Cloud Apps — Microsoft Defender for Cloud Apps (MDCA) is the correct solution because it provides Cloud Access Security Broker (CASB) capabilities, including anomaly detection for user behavior across third-party cloud apps like Box. It can detect activities such as an unusually large number of file downloads from an unfamiliar location using its built-in behavioral analytics and then automatically apply a governance action, such as suspending the user's account, via policy-driven automated responses.
What should I do if I get this SC-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 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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