SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
An organization uses Microsoft 365 Defender and wants to automate the investigation and response to common email-based phishing attacks. They want the system to automatically take actions such as deleting malicious emails from user inboxes across the organization after analysis. Which Microsoft 365 Defender component provides this automated capability?
⚠ Common exam trap
It's easy for candidates to confuse Microsoft Defender for Office 365 with Microsoft Defender for Endpoint, mistakenly thinking endpoint protection can handle email threats, but only Defender for Office 365 includes the email-specific automated investigation and response (AIR) engine.
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 automated investigation and response (AIR) capabilities specifically designed for email-based threats like phishing. When a phishing email is detected, AIR can automatically trigger remediation actions—such as soft-deleting or hard-deleting the malicious message from user mailboxes—based on predefined playbooks, without requiring manual intervention.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure AD Identity Protection
Why it's wrong here
Azure AD Identity Protection is a feature of Azure Active Directory that specializes in detecting identity-based risks, such as compromised credentials, impossible travel, or sign-ins from suspicious IP addresses. It leverages machine learning to identify these risks and can automatically enforce conditional access policies, like requiring multi-factor authentication or password resets, to protect user identities. However, its purpose is not to scan or protect against threats embedded within email content itself.
When this WOULD be correct
A question asking which Microsoft 365 Defender component automatically responds to identity-based risks, such as blocking compromised accounts or requiring MFA re-enrollment based on user risk level.
- ✓
Microsoft Defender for Office 365
Why this is correct
Microsoft Defender for Office 365 is the correct solution because it provides advanced protection against sophisticated email and collaboration threats, including phishing, business email compromise, and malware delivered via email, Microsoft Teams, SharePoint, and OneDrive. It utilizes capabilities like Safe Attachments and Safe Links to scan content in real-time and includes automated investigation and response (AIR) for email-borne attacks, directly addressing the need to protect against email threats.
- ✗
Microsoft Defender for Endpoint
Why it's wrong here
Microsoft Defender for Endpoint is an enterprise endpoint security platform that provides next-generation protection, endpoint detection and response (EDR), vulnerability management, and automated investigation and remediation for devices. It protects workstations, servers, and mobile devices against file-based and fileless malware, network exploits, and other threats that reach the endpoint. This solution focuses on device-level security post-delivery, rather than scanning and protecting against threats within incoming email before it reaches a user's inbox.
When this WOULD be correct
A question asks: 'An organization wants to automatically investigate and respond to threats detected on employee laptops, such as isolating compromised devices from the network. Which Microsoft 365 Defender component provides this automated capability?'
- ✗
Microsoft Defender for Cloud Apps
Why it's wrong here
Microsoft Defender for Cloud Apps functions as a Cloud Access Security Broker (CASB) that focuses on discovering and controlling shadow IT, protecting sensitive data across sanctioned cloud applications, and identifying anomalous user behavior within those apps. While it secures cloud environments, its primary scope is not the real-time scanning and protection against email-based threats or malware delivered through email channels, but rather data governance and threat protection within cloud services.
When this WOULD be correct
An organization wants to detect and control the use of unsanctioned cloud apps, enforce data loss prevention policies, and investigate user activities across cloud services like Salesforce or Box. In that scenario, Microsoft Defender for Cloud Apps 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
Microsoft Defender for Office 365 is the correct solution because it provides advanced protection against sophisticated email and collaboration threats, including phishing, business email compromise, and malware delivered via email, Microsoft Teams, SharePoint, and OneDrive. It utilizes capabilities like Safe Attachments and Safe Links to scan content in real-time and includes automated investigation and response (AIR) for email-borne attacks, directly addressing the need to protect against email threats.
✗Azure AD Identity ProtectionWrong answer — click to see why▾
Why this is wrong here
Azure AD Identity Protection focuses on user identities and sign-in risks, not on email content or automated remediation of phishing emails in user mailboxes.
★ When this WOULD be the correct answer
A question asking which Microsoft 365 Defender component automatically responds to identity-based risks, such as blocking compromised accounts or requiring MFA re-enrollment based on user risk level.
Why candidates choose this
Candidates may confuse identity protection with email security, assuming that automated response to phishing attacks is handled by identity protection because phishing often targets user credentials.
✗Microsoft Defender for EndpointWrong answer — click to see why▾
Why this is wrong here
Microsoft Defender for Endpoint focuses on protecting devices (endpoints) from threats like malware and exploits, not on automating investigation and response to email-based phishing attacks, which is the domain of Defender for Office 365.
★ When this WOULD be the correct answer
A question asks: 'An organization wants to automatically investigate and respond to threats detected on employee laptops, such as isolating compromised devices from the network. Which Microsoft 365 Defender component provides this automated capability?'
Why candidates choose this
Candidates may confuse the general 'automated investigation and response' capability of Microsoft 365 Defender with the specific component for endpoints, overlooking that the question explicitly mentions email-based phishing attacks.
✗Microsoft Defender for Cloud AppsWrong answer — click to see why▾
Why this is wrong here
Microsoft Defender for Cloud Apps is a cloud access security broker (CASB) that focuses on securing cloud applications and services, not on automating investigation and response to email-based phishing attacks within Microsoft 365 Defender.
★ When this WOULD be the correct answer
An organization wants to detect and control the use of unsanctioned cloud apps, enforce data loss prevention policies, and investigate user activities across cloud services like Salesforce or Box. In that scenario, Microsoft Defender for Cloud Apps would be the correct answer.
Why candidates choose this
Candidates may confuse the broad 'cloud security' scope of Defender for Cloud Apps with the email security capabilities of Defender for Office 365, assuming it covers all cloud-based threats including email phishing.
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?”
Go deeper
Related to this question
Learn chapter
Microsoft Entra ID
Key term
Microsoft Defender for Office 365
Microsoft Defender for Office 365 is a cloud-based email and collaboration security service that protects organizations against malicious threats like phishing, malware, and spam in email messages and Office 365 apps.
Key term
Anti-phishing policy
An anti-phishing policy is a set of rules and technical controls that organizations use to detect, block, and respond to email or message-based attacks that trick users into revealing sensitive information.
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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.