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 company is preparing for a merger and wants to prevent communication between the Human Resources and Research departments regarding sensitive salary data during the due diligence period. They need a Microsoft Purview solution that can block all email and chat between users in these two groups, as well as prevent file sharing in Teams and SharePoint. Which solution should they configure?
Correct. Information Barriers enforce policies to prevent communication and collaboration between defined segments, covering email, Teams chat, file sharing, and more.
B
Data Loss Prevention (DLP)
Why wrong: Incorrect. DLP policies detect and protect sensitive data but do not block all communications between groups; they focus on content patterns.
C
Sensitivity Labels
Why wrong: Incorrect. Sensitivity labels classify and protect documents and emails based on sensitivity, but they do not prevent communication between user groups.
D
eDiscovery (Premium)
Why wrong: Incorrect. eDiscovery is used for searching and exporting content for legal cases, not for preventing communications.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Information Barriers
Information Barriers (IB) in Microsoft Purview are specifically designed to prevent communication and collaboration between defined user groups, such as HR and Research, by blocking email, Teams chat, and SharePoint/OneDrive file sharing. This solution enforces policies at the transport and service level, ensuring that sensitive salary data is not inadvertently shared during the merger due diligence period.
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 Barriers
Why this is correct
Correct. Information Barriers enforce policies to prevent communication and collaboration between defined segments, covering email, Teams chat, file sharing, and more.
Related concept
Read the scenario before looking for a memorised answer.
✗
Data Loss Prevention (DLP)
Why it's wrong here
Incorrect. DLP policies detect and protect sensitive data but do not block all communications between groups; they focus on content patterns.
✗
Sensitivity Labels
Why it's wrong here
Incorrect. Sensitivity labels classify and protect documents and emails based on sensitivity, but they do not prevent communication between user groups.
✗
eDiscovery (Premium)
Why it's wrong here
Incorrect. eDiscovery is used for searching and exporting content for legal cases, not for preventing communications.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Information Barriers with DLP, assuming that blocking sensitive data patterns is equivalent to blocking all communication between groups, but DLP cannot enforce department-wide communication restrictions—it only acts on content matches.
Detailed technical explanation
How to think about this question
Information Barriers use policies defined in the Microsoft Purview compliance portal, leveraging Azure Active Directory user attributes and segment definitions to create communication boundaries. Under the hood, Exchange Online transport rules and Teams policy assignments enforce these blocks at the SMTP and chat service level, preventing message delivery and file sharing even if users attempt to bypass via direct links. In a real-world merger, IB can be configured with 'Block' mode to stop all cross-segment communication, while still allowing exceptions for specific users (e.g., legal counsel) via policy segments.
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 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.
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: Information Barriers — Information Barriers (IB) in Microsoft Purview are specifically designed to prevent communication and collaboration between defined user groups, such as HR and Research, by blocking email, Teams chat, and SharePoint/OneDrive file sharing. This solution enforces policies at the transport and service level, ensuring that sensitive salary data is not inadvertently shared during the merger due diligence period.
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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