This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 user reports that they cannot access their Microsoft 365 email on their mobile device. The user can access Outlook on the web. Which Microsoft 365 app should the administrator check to verify the user's mobile device is compliant?
Microsoft Intune
Intune manages device compliance and can block access if the device is non-compliant.
Microsoft Defender for Office 365
Why wrong: This is for threat protection, not device management.
Microsoft Entra ID
Why wrong: Entra ID handles identity, not device compliance.
Microsoft Purview
Why wrong: Purview focuses on data governance and compliance, not device management.
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 the correct answer because it is the mobile device management (MDM) and mobile application management (MAM) component within Microsoft 365. When a user cannot access email on a mobile device but can via Outlook on the web, the issue is likely a device compliance policy blocking access. Intune enforces conditional access policies by checking device compliance (e.g., encryption, jailbreak status, minimum OS version) before allowing Exchange Online connectivity.
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 Intune
Why this is correct
Intune manages device compliance and can block access if the device is non-compliant.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Defender for Office 365
Why it's wrong here
This is for threat protection, not device management.
Microsoft Entra ID
Why it's wrong here
Entra ID handles identity, not device compliance.
Microsoft Purview
Why it's wrong here
Purview focuses on data governance and compliance, not device management.
Common exam traps
The trap here is that candidates confuse Microsoft Entra ID (which handles conditional access policies) with Intune (which actually performs the device compliance check and reports the status to Entra ID).
Detailed technical explanation
Under the hood, Intune uses the Microsoft Intune Management Extension and the Company Portal app to enforce compliance policies. When a device is non-compliant, Intune reports the status to Entra ID, which then blocks the token issuance for Exchange Online via conditional access. A common subtlety is that even if a device is enrolled, a missing compliance policy (e.g., requiring a PIN or encryption) can silently block email sync without an obvious error message.
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 the correct answer because it is the mobile device management (MDM) and mobile application management (MAM) component within Microsoft 365. When a user cannot access email on a mobile device but can via Outlook on the web, the issue is likely a device compliance policy blocking access. Intune enforces conditional access policies by checking device compliance (e.g., encryption, jailbreak status, minimum OS version) before allowing Exchange Online connectivity.
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 24, 2026
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