MS-900 Practice Question: Describe security, compliance, privacy, and trust in Microsoft 365
This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. 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.
A compliance administrator needs to ensure that any document containing a patient's health information (e.g., medical record number) is automatically encrypted and restricted to authorized users. The encryption should be enforced regardless of where the document is saved (SharePoint, OneDrive, or email). Which Microsoft Purview feature should they configure?
Why wrong: IRM can protect documents by restricting actions, but it does not automatically classify or label content based on sensitive data detection.
B
Auto-labeling policies with sensitivity labels
Auto-labeling can automatically detect sensitive data (like health info) and apply a sensitivity label that enforces encryption and access restrictions.
C
Data Loss Prevention (DLP) policies
Why wrong: DLP detects and prevents sharing of sensitive data but does not automatically encrypt documents at rest.
D
Retention labels
Why wrong: Retention labels are used to keep or delete content for compliance and do not apply encryption or restrictions.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Auto-labeling policies with sensitivity labels
Auto-labeling policies with sensitivity labels are the correct choice because they can automatically apply encryption and access restrictions to documents containing sensitive data like medical record numbers, regardless of where the document is saved (SharePoint, OneDrive, or email). Sensitivity labels support persistent protection that travels with the file, enforcing encryption and authorized user restrictions even when the file is moved or copied. This meets the requirement for automatic, location-independent encryption and access control.
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.
✗
Information Rights Management (IRM)
Why it's wrong here
IRM can protect documents by restricting actions, but it does not automatically classify or label content based on sensitive data detection.
✓
Auto-labeling policies with sensitivity labels
Why this is correct
Auto-labeling can automatically detect sensitive data (like health info) and apply a sensitivity label that enforces encryption and access restrictions.
Related concept
Read the scenario before looking for a memorised answer.
✗
Data Loss Prevention (DLP) policies
Why it's wrong here
DLP detects and prevents sharing of sensitive data but does not automatically encrypt documents at rest.
✗
Retention labels
Why it's wrong here
Retention labels are used to keep or delete content for compliance and do not apply encryption or restrictions.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse DLP policies with sensitivity labels, thinking DLP can enforce encryption, but DLP only monitors and blocks actions—it does not apply persistent protection like sensitivity labels do.
Detailed technical explanation
How to think about this question
Sensitivity labels use Azure Information Protection (AIP) to apply encryption via Azure Rights Management (Azure RMS), which uses the AD RMS cryptographic protocol to enforce persistent protection. The auto-labeling policy can be configured with a condition that detects a sensitive info type (e.g., U.S. Medical Record Number) and automatically applies a label that encrypts the document and restricts access to authorized users, even if the file is saved to a different location or shared via email. A real-world scenario is a healthcare organization that needs to ensure patient records remain encrypted and accessible only to specific roles, regardless of whether the file is stored in SharePoint, OneDrive, or attached to an email.
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 security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Auto-labeling policies with sensitivity labels — Auto-labeling policies with sensitivity labels are the correct choice because they can automatically apply encryption and access restrictions to documents containing sensitive data like medical record numbers, regardless of where the document is saved (SharePoint, OneDrive, or email). Sensitivity labels support persistent protection that travels with the file, enforcing encryption and authorized user restrictions even when the file is moved or copied. This meets the requirement for automatic, location-independent encryption and access control.
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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