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. 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.
A company uses Microsoft 365 Business Premium. A user reports that when they try to access a file in SharePoint Online, they receive an error that the file is blocked by policy. The IT admin needs to identify which policy is blocking the file. Which tool should the admin use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Purview Data Loss Prevention policies
Microsoft Purview Data Loss Prevention (DLP) policies are specifically designed to detect and block the sharing or access of sensitive information, such as credit card numbers or personally identifiable information, in Microsoft 365 services like SharePoint Online. When a file is blocked with a 'blocked by policy' error, it is typically because a DLP rule has matched the file's content and applied an action to restrict access. The admin can use the Microsoft Purview compliance portal to review DLP policy matches and identify the exact rule that triggered the block.
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 Intune compliance policies
Why it's wrong here
Intune policies apply to device compliance, not SharePoint file access.
✗
Microsoft Entra ID Conditional Access policies
Why it's wrong here
Conditional Access controls access at the sign-in level, not file-level blocking.
✗
Microsoft Defender for Cloud Apps session policies
Why it's wrong here
Session policies control app behavior but not direct file blocking in SharePoint.
✓
Microsoft Purview Data Loss Prevention policies
Why this is correct
DLP policies in Purview can block files in SharePoint based on sensitive content.
Related concept
Read the scenario before looking for a memorised answer.
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 session policies (which control user actions in real-time) with SharePoint's native DLP enforcement, but the 'blocked by policy' error is a direct result of a DLP policy applied at the SharePoint level, not a session-level control.
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Purview DLP integrates with SharePoint Online via the Unified DLP platform, which uses sensitive information types and trainable classifiers to scan documents at rest and during access. When a DLP rule matches, SharePoint applies a 'block access' action that replaces the file's content with a policy tip and logs the event in the Microsoft 365 audit log. A real-world scenario is a healthcare organization using DLP to block access to files containing patient health information (PHI) for unauthorized users, where the admin must review the DLP alerts in the Purview portal to see which rule and sensitive info type triggered the block.
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 Data Loss Prevention policies — Microsoft Purview Data Loss Prevention (DLP) policies are specifically designed to detect and block the sharing or access of sensitive information, such as credit card numbers or personally identifiable information, in Microsoft 365 services like SharePoint Online. When a file is blocked with a 'blocked by policy' error, it is typically because a DLP rule has matched the file's content and applied an action to restrict access. The admin can use the Microsoft Purview compliance portal to review DLP policy matches and identify the exact rule that triggered the block.
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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