SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
A security team monitors user activities in third-party cloud apps like Box and Dropbox. They want to automatically detect when a user performs an anomalous file download after signing in from an unusual location, and then suspend the user's account and initiate an investigation. Which Microsoft security solution should they use?
⚠ Common exam trap
A common mix-up: candidates confuse Microsoft Defender for Cloud Apps with Microsoft Defender for Identity, thinking both handle user behavior, but MDCA focuses on cloud app usage while MDI focuses on on-premises identity attacks.
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) functionality, including anomaly detection for user activities across third-party cloud apps like Box and Dropbox. It can automatically detect anomalous file downloads after unusual sign-in locations using behavioral analytics and then trigger automated actions such as suspending the user account and initiating an investigation via integration with Microsoft 365 Defender.
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
Microsoft Defender for Office 365 is specifically designed to protect an organization's Microsoft 365 environment, including email (Exchange Online), SharePoint, OneDrive, and Teams. Its primary functions involve advanced threat protection against phishing, spam, malware, and business email compromise, utilizing capabilities like Safe Attachments and Safe Links. It does not extend its monitoring or protection capabilities to third-party cloud applications outside the Microsoft 365 ecosystem.
- ✓
Microsoft Defender for Cloud Apps
Why this is correct
Microsoft Defender for Cloud Apps functions as a Cloud Access Security Broker (CASB), providing comprehensive visibility, control, and protection for data and user activities across sanctioned and unsanctioned cloud applications. It enables organizations to discover shadow IT, monitor user sessions in real-time, enforce data loss prevention policies, and detect anomalous behavior in third-party cloud services like Box, Dropbox, or Salesforce. This capability directly addresses the need to monitor user activities within external cloud applications.
- ✗
Microsoft Defender for Identity
Why it's wrong here
Microsoft Defender for Identity focuses on protecting hybrid identity environments by monitoring signals from on-premises Active Directory and Azure Active Directory. It identifies, detects, and investigates advanced threats, compromised identities, and malicious insider actions targeting user accounts and domain controllers. While crucial for identity security, it does not directly monitor user activity within third-party cloud applications or provide session-level controls for SaaS applications.
- ✗
Microsoft Defender for Endpoint
Why it's wrong here
Microsoft Defender for Endpoint provides robust endpoint detection and response (EDR), vulnerability management, and attack surface reduction capabilities for devices running various operating systems like Windows, macOS, and Linux. Its core function is to protect endpoints from malware, ransomware, and other cyber threats by monitoring device behavior and network connections. It does not, however, provide direct visibility into or control over user activities within cloud applications themselves, nor does it offer cloud app session controls.
Go deeper
Related to this question
Learn chapter
Core Security Concepts
Key term
Microsoft Defender
Microsoft Defender is a suite of security products that protects devices, data, and identities from cyber threats like malware, phishing, and unauthorized access.
Key term
User account
A user account is a digital identity that allows a person to access a computer system, network, or application with specific permissions and settings.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.