MS-900 Describe Microsoft 365 apps and services Practice Question
This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 uses Microsoft 365 E5 and wants to automatically classify and protect sensitive documents stored in SharePoint Online based on content patterns (e.g., credit card numbers). They need to apply encryption and restrict access when such content is detected. Which Microsoft 365 service should they configure?
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 content-based classification and protection for sensitive data. It uses trainable classifiers and sensitive information types (e.g., credit card numbers) to automatically apply encryption and restrict access via sensitivity labels in SharePoint Online.
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 Entra ID
Why it's wrong here
Entra ID manages identities, not content classification.
✓
Microsoft Purview Information Protection
Why this is correct
Purview Information Protection provides automatic classification and labeling based on sensitive content.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft Sentinel
Why it's wrong here
Sentinel is a cloud-native SIEM, not for data classification.
✗
Microsoft Defender for Cloud Apps
Why it's wrong here
Defender for Cloud Apps is a CASB that can apply policies, but the core classification is done by Purview.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Defender for Cloud Apps (a CASB) with data classification, but it lacks the native content scanning and encryption enforcement that Purview Information Protection provides.
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Purview Information Protection leverages the Microsoft 365 unified labeling platform and the Azure Rights Management service (Azure RMS) to enforce encryption. When a sensitive information type like a credit card number is detected, a sensitivity label with encryption settings is automatically applied, and the document's access is restricted based on the label's permissions. In a real-world scenario, an organization might configure an auto-labeling policy to apply the 'Highly Confidential' label to any SharePoint document containing a Social Security number, ensuring only authorized users can decrypt and view it.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Purview Information Protection — Microsoft Purview Information Protection (formerly Azure Information Protection) is the correct service because it provides content-based classification and protection for sensitive data. It uses trainable classifiers and sensitive information types (e.g., credit card numbers) to automatically apply encryption and restrict access via sensitivity labels in SharePoint Online.
What should I do if I get this MS-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.
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Question Discussion
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