- A
Microsoft Defender for Endpoint
Why wrong: Defender for Endpoint protects endpoints (workstations, servers) from malware and provides EDR capabilities. It does not scan files in SharePoint Online or OneDrive.
- B
Microsoft Defender for Identity
Why wrong: Defender for Identity monitors on-premises Active Directory for advanced threats like pass-the-hash. It does not assess files in cloud storage.
- C
Microsoft Defender for Office 365
Defender for Office 365 includes Safe Attachments for SharePoint, OneDrive, and Teams, which scans and blocks malicious files in those locations. It also provides Safe Links and anti-phishing protection.
- D
Microsoft Defender for Cloud
Why wrong: Defender for Cloud provides cloud security posture management and advanced threat protection for Azure, on-premises, and other clouds. It does not directly scan files in SharePoint/OneDrive.
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. 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.
A company uses Microsoft 365 and stores many business documents in SharePoint Online and OneDrive. The security team wants to automatically detect and block malicious files (e.g., those containing ransomware or other malware) that are uploaded to these document libraries. Files should be scanned and held until proven safe. Which Microsoft security solution should they enable to provide this protection?
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 Attachments for SharePoint, OneDrive, and Microsoft Teams, which automatically scans files uploaded to these document libraries. If a file is detected as malicious (e.g., ransomware or malware), it is blocked and held in quarantine until it is proven safe, providing the exact protection described in the scenario.
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 Endpoint
Why it's wrong here
Defender for Endpoint protects endpoints (workstations, servers) from malware and provides EDR capabilities. It does not scan files in SharePoint Online or OneDrive.
When this WOULD be correct
A company wants to protect its Windows and macOS devices from malware and detect advanced threats on endpoints. The question asks: 'Which solution should they deploy to provide antivirus, endpoint detection and response (EDR), and automated investigation on corporate laptops?'
- ✗
Microsoft Defender for Identity
Why it's wrong here
Defender for Identity monitors on-premises Active Directory for advanced threats like pass-the-hash. It does not assess files in cloud storage.
When this WOULD be correct
A question asking which Microsoft solution detects and alerts on suspicious user behavior, such as anomalous logins or privilege escalation attempts, using on-premises Active Directory and cloud identity signals would make Defender for Identity the correct answer.
- ✓
Microsoft Defender for Office 365
Why this is correct
Defender for Office 365 includes Safe Attachments for SharePoint, OneDrive, and Teams, which scans and blocks malicious files in those locations. It also provides Safe Links and anti-phishing protection.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Microsoft Defender for Cloud
Why it's wrong here
Defender for Cloud provides cloud security posture management and advanced threat protection for Azure, on-premises, and other clouds. It does not directly scan files in SharePoint/OneDrive.
When this WOULD be correct
A company runs Azure VMs and wants to detect and respond to threats on those virtual machines, including fileless malware and suspicious process behaviors. Enabling Microsoft Defender for Cloud would be the correct answer.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The SC-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Microsoft Defender for Office 365Correct answer▾
Why this is correct
Defender for Office 365 includes Safe Attachments for SharePoint, OneDrive, and Teams, which scans and blocks malicious files in those locations. It also provides Safe Links and anti-phishing protection.
✗Microsoft Defender for EndpointWrong answer — click to see why▾
Why this is wrong here
Microsoft Defender for Endpoint protects devices (endpoints) from malware, but does not scan files uploaded to SharePoint Online or OneDrive. The question specifically asks for a solution that scans files in document libraries, which is a workload protected by Defender for Office 365.
★ When this WOULD be the correct answer
A company wants to protect its Windows and macOS devices from malware and detect advanced threats on endpoints. The question asks: 'Which solution should they deploy to provide antivirus, endpoint detection and response (EDR), and automated investigation on corporate laptops?'
Why candidates choose this
Candidates may think that since Defender for Endpoint detects malware on devices, it would also scan files in cloud storage. They overlook that SharePoint and OneDrive are cloud services protected by Defender for Office 365, not endpoint-level solutions.
✗Microsoft Defender for IdentityWrong answer — click to see why▾
Why this is wrong here
Microsoft Defender for Identity focuses on detecting and investigating advanced threats, compromised identities, and malicious insider actions using Active Directory signals, not on scanning files in SharePoint or OneDrive for malware.
★ When this WOULD be the correct answer
A question asking which Microsoft solution detects and alerts on suspicious user behavior, such as anomalous logins or privilege escalation attempts, using on-premises Active Directory and cloud identity signals would make Defender for Identity the correct answer.
Why candidates choose this
Candidates may confuse 'Identity' with 'Office 365' because both involve Microsoft 365 security, or they might think identity protection includes file scanning, not realizing the specific focus on user accounts and authentication.
✗Microsoft Defender for CloudWrong answer — click to see why▾
Why this is wrong here
Microsoft Defender for Cloud is designed to protect cloud workloads (e.g., VMs, containers, PaaS services) across Azure and hybrid environments, not to scan and block malicious files in SharePoint Online or OneDrive document libraries.
★ When this WOULD be the correct answer
A company runs Azure VMs and wants to detect and respond to threats on those virtual machines, including fileless malware and suspicious process behaviors. Enabling Microsoft Defender for Cloud would be the correct answer.
Why candidates choose this
Candidates may confuse 'cloud' with Microsoft 365 cloud services, assuming Defender for Cloud covers all cloud-based threats including SharePoint and OneDrive, when it actually focuses on infrastructure security.
Analysis generated from the official SC-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Defender for Office 365 with Microsoft Defender for Endpoint, assuming endpoint protection covers cloud storage scanning, but Safe Attachments is a specific feature of Defender for Office 365 that protects SharePoint and OneDrive at the file level.
Detailed technical explanation
How to think about this question
Safe Attachments for SharePoint, OneDrive, and Teams uses the same detonation chamber technology as Exchange Online Protection (EOP) to open and analyze files in a sandboxed environment before releasing them. When a file is uploaded, it is held in a 'pending' state and a hash is checked against known threat intelligence; if the file is determined to be malicious, it is automatically moved to quarantine and a policy-based alert is triggered. This process is transparent to end users, who see a warning if they attempt to open a file that is still being scanned.
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 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
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 Office 365 — Microsoft Defender for Office 365 includes Safe Attachments for SharePoint, OneDrive, and Microsoft Teams, which automatically scans files uploaded to these document libraries. If a file is detected as malicious (e.g., ransomware or malware), it is blocked and held in quarantine until it is proven safe, providing the exact protection described in the scenario.
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.
About these practice questions
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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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