SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
A company uses Microsoft 365 and allows employees to access corporate email and documents from their personal devices. The security team wants to protect against malicious links in emails and Microsoft Teams messages. When a user clicks a link, it should be checked in real-time to see if it leads to a known malicious site. If it does, access should be blocked. Which Microsoft security solution provides this capability?
⚠ Common exam trap
Watch out — candidates often confuse Microsoft Defender for Office 365 (which handles email and collaboration security) with Microsoft Defender for Endpoint (which handles device-level threats), leading them to choose the endpoint solution for a link-scanning scenario.
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 Office 365
Microsoft Defender for Office 365 includes Safe Links, which provides real-time URL scanning at the time of click. When a user clicks a link in an email or Teams message, the URL is rewritten and checked against a dynamic list of known malicious sites. If the link is determined to be malicious, access is blocked, and the user is redirected to a warning page.
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 Endpoint
Why it's wrong here
Microsoft Defender for Endpoint primarily focuses on endpoint detection and response (EDR), protecting devices like workstations and servers from file-based malware, exploits, and post-breach activities. While it can block access to known malicious websites from an endpoint, its core function does not involve real-time scanning and rewriting of URLs embedded within email messages or Teams chats before they are delivered or clicked by a user. Its scope is device-centric, not content-centric for collaboration platforms.
- ✓
Microsoft Defender for Office 365
Why this is correct
Microsoft Defender for Office 365 is the correct solution as it specifically provides advanced protection against phishing, spam, malware, and other threats delivered via email and collaboration tools like Microsoft Teams. Its key features, Safe Links and Safe Attachments, are designed to perform real-time scanning of URLs and attachments. Safe Links rewrites and scans URLs at the time of click, while Safe Attachments detonates suspicious files in a sandbox environment, directly addressing the need for real-time URL scanning in email and Teams.
- ✗
Microsoft Defender for Cloud Apps
Why it's wrong here
Microsoft Defender for Cloud Apps functions as a Cloud Access Security Broker (CASB), offering visibility, control, and threat protection across various cloud applications, both sanctioned and unsanctioned. Its capabilities include discovering shadow IT, monitoring user activity within cloud apps, and enforcing data loss prevention policies. However, its primary role is not to perform real-time URL scanning within the content of email messages or Teams conversations, but rather to govern access and usage of cloud services themselves.
- ✗
Microsoft Defender for Identity
Why it's wrong here
Microsoft Defender for Identity is designed to protect hybrid identity environments by monitoring Active Directory signals to identify, detect, and investigate advanced threats like credential theft, lateral movement, and other malicious activities targeting user identities. It analyzes user behavior and domain controller traffic for anomalies and signs of attack. This service focuses on securing the identity infrastructure and user accounts, not on scanning the content of email or Teams communications for malicious links.
Go deeper
Related to this question
Learn chapter
Core Security Concepts
Key term
Office 365
Office 365 is a cloud-based subscription service from Microsoft that provides access to productivity applications like Word, Excel, and Outlook, along with other cloud services, for a monthly or annual fee.
Key term
Microsoft 365
Microsoft 365 is a subscription-based cloud service from Microsoft that combines productivity tools like Office apps with security, device management, and online storage.
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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.