This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. 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.
Which THREE Microsoft 365 services are included in the Enterprise Mobility + Security (EMS) suite?
Microsoft Sentinel
Why wrong: Sentinel is a SIEM, not part of EMS.
Microsoft Purview
Why wrong: Purview is a compliance solution, not part of EMS.
Microsoft Intune
Intune is part of EMS for mobile device management.
Microsoft Entra ID
Entra ID (formerly Azure AD) is part of EMS for identity.
Microsoft Defender for Cloud Apps
Defender for Cloud Apps is part of EMS for cloud app security.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Microsoft Intune
Microsoft Intune is a core component of Enterprise Mobility + Security (EMS) because it provides cloud-based mobile device management (MDM) and mobile application management (MAM) using the OMA-DM protocol. It enforces conditional access policies and allows IT to manage devices and applications without requiring on-premises infrastructure, directly aligning with EMS's goal of securing and managing endpoints.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Microsoft Sentinel
Why it's wrong here
Sentinel is a SIEM, not part of EMS.
Microsoft Purview
Why it's wrong here
Purview is a compliance solution, not part of EMS.
Microsoft Intune
Why this is correct
Intune is part of EMS for mobile device management.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Entra ID
Why this is correct
Entra ID (formerly Azure AD) is part of EMS for identity.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Defender for Cloud Apps
Why this is correct
Defender for Cloud Apps is part of EMS for cloud app security.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Microsoft often tests the misconception that Microsoft Purview or Microsoft Sentinel are part of EMS, when in fact EMS focuses exclusively on identity, endpoint management, and cloud app security, not on SIEM or data governance.
Detailed technical explanation
EMS is a bundle of Azure Active Directory Premium P1/P2, Microsoft Intune, and Microsoft Defender for Cloud Apps (formerly Cloud App Security). Intune uses the OMA-DM protocol for device enrollment and policy enforcement, while Defender for Cloud Apps leverages the Cloud App Security Broker (CASB) model to discover and control shadow IT across SaaS applications. The EMS suite is designed to provide identity-driven security, with conditional access policies evaluated at authentication time using Azure AD (now Entra ID) signals.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Intune — Microsoft Intune is a core component of Enterprise Mobility + Security (EMS) because it provides cloud-based mobile device management (MDM) and mobile application management (MAM) using the OMA-DM protocol. It enforces conditional access policies and allows IT to manage devices and applications without requiring on-premises infrastructure, directly aligning with EMS's goal of securing and managing endpoints.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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