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.
An organization needs to automatically delete Microsoft Teams chat messages after 90 days to comply with a data minimization policy. Which Microsoft Purview feature should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Retention policies
Retention policies in Microsoft Purview are designed to either retain data for a specified period, delete it after that period, or both. For Microsoft Teams chat messages, a retention policy can be configured to automatically delete messages after 90 days, directly supporting a data minimization policy. This is the correct feature because it provides time-based deletion for compliance requirements.
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.
✗
Data Loss Prevention (DLP)
Why it's wrong here
DLP prevents accidental sharing of sensitive data, not automated deletion.
✓
Retention policies
Why this is correct
Retention policies allow you to define how long content is retained and when it is automatically deleted.
Related concept
Read the scenario before looking for a memorised answer.
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Communication Compliance
Why it's wrong here
Communication compliance is for monitoring and analyzing messages for policy violations, not for deletion.
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Information Barriers
Why it's wrong here
Information barriers restrict communication between groups to avoid conflicts of interest, not for deletion.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse retention policies (which manage data lifecycle and deletion) with Data Loss Prevention (DLP), assuming DLP can also delete data after a period, but DLP only blocks or alerts on data in motion, not on scheduled deletion.
Detailed technical explanation
How to think about this question
Retention policies in Microsoft Purview work by assigning a retention tag to Teams chat messages at the mailbox level (using the Exchange Online messaging records management engine), which then applies a 90-day deletion action. A subtle behavior is that if a user deletes a message before the 90-day period, the policy still retains the message in a hidden, recoverable folder until the retention period expires, ensuring compliance even with user-initiated deletions. In a real-world scenario, this prevents data hoarding while allowing legal holds or eDiscovery searches during the retention window.
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: Retention policies — Retention policies in Microsoft Purview are designed to either retain data for a specified period, delete it after that period, or both. For Microsoft Teams chat messages, a retention policy can be configured to automatically delete messages after 90 days, directly supporting a data minimization policy. This is the correct feature because it provides time-based deletion for compliance requirements.
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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