This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
An organization wants to use Microsoft 365 to automatically classify and protect sensitive data in emails and documents. Which service should they use?
Microsoft Purview Information Protection
This service provides automatic classification and protection of sensitive data.
Microsoft Intune
Why wrong: This is a mobile device management (MDM) service.
Microsoft Defender for Office 365
Why wrong: This is for anti-phishing and anti-malware, not data classification.
Microsoft Entra ID
Why wrong: This is an identity and access management service.
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 Purview Information Protection
Microsoft Purview Information Protection (formerly Azure Information Protection) is the correct service because it provides data classification, labeling, and protection capabilities directly within Microsoft 365. It uses sensitivity labels to automatically classify emails and documents based on conditions like content patterns or custom keywords, and then applies encryption, rights management, or visual markings (e.g., headers/footers) to protect sensitive data both at rest and in transit.
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 Purview Information Protection
Why this is correct
This service provides automatic classification and protection of sensitive data.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Intune
Why it's wrong here
This is a mobile device management (MDM) service.
Microsoft Defender for Office 365
Why it's wrong here
This is for anti-phishing and anti-malware, not data classification.
Microsoft Entra ID
Why it's wrong here
This is an identity and access management service.
Common exam traps
The trap here is that candidates often confuse Microsoft Defender for Office 365 (which protects against threats) with Purview Information Protection (which classifies and protects data), leading them to select Option C because they associate 'protect' with security rather than data governance.
Detailed technical explanation
Under the hood, Purview Information Protection integrates with the Microsoft 365 unified labeling client and the Azure Rights Management service (Azure RMS) to apply persistent protection. When a sensitivity label is applied, it embeds metadata (using the MSIP_Label header in emails or custom XML in Office documents) that travels with the data, enabling enforcement of encryption and usage restrictions even when the file is shared outside the organization. A real-world scenario is automatically labeling all emails containing credit card numbers with a 'Confidential' label that encrypts the message and restricts forwarding.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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 Purview Information Protection — Microsoft Purview Information Protection (formerly Azure Information Protection) is the correct service because it provides data classification, labeling, and protection capabilities directly within Microsoft 365. It uses sensitivity labels to automatically classify emails and documents based on conditions like content patterns or custom keywords, and then applies encryption, rights management, or visual markings (e.g., headers/footers) to protect sensitive data both at rest and in transit.
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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