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. 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 compliance administrator needs to block sharing of documents containing credit card numbers. Which Microsoft 365 capability is the best fit?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Data Loss Prevention policies
Data Loss Prevention (DLP) policies in Microsoft 365 are specifically designed to identify, monitor, and automatically protect sensitive information—such as credit card numbers—across Exchange Online, SharePoint, OneDrive, and Teams. By configuring a DLP policy with a built-in sensitive info type for credit card numbers, the administrator can block users from sharing documents containing that data, either by preventing the action or triggering a notification. This directly addresses the compliance requirement to block sharing of documents with credit card numbers.
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 policies
Why this is correct
DLP detects sensitive information types and can restrict sharing across Microsoft 365 locations.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft Teams live events
Why it's wrong here
Teams events are for communication, not this compliance/security requirement.
✗
Microsoft Bookings
Why it's wrong here
Bookings schedules appointments and is unrelated to this security requirement.
✗
OneDrive sync client
Why it's wrong here
The sync client synchronizes files and does not implement this control by itself.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse the OneDrive sync client with the OneDrive cloud service, thinking the sync client can enforce DLP policies locally, when in fact DLP policies are applied at the cloud service layer and the sync client simply replicates cloud-side restrictions.
Detailed technical explanation
How to think about this question
Microsoft 365 DLP uses sensitive information types (SITs) defined by regular expressions and keyword lists, such as the credit card number SIT (built-in rule ID: 50842eb7-edc8-4019-85dd-5a5c1f2bb085), which validates the Luhn checksum to reduce false positives. When a DLP policy is applied to a workload like SharePoint or OneDrive, it can block external sharing, block sharing with everyone, or even block the document from being shared entirely, with the option to send a policy tip to the user and an incident report to the compliance team. In a real-world scenario, if a user tries to share a document containing a valid credit card number via a sharing link, the DLP policy will evaluate the content in real time and either block the share or require the user to override with justification.
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: Data Loss Prevention policies — Data Loss Prevention (DLP) policies in Microsoft 365 are specifically designed to identify, monitor, and automatically protect sensitive information—such as credit card numbers—across Exchange Online, SharePoint, OneDrive, and Teams. By configuring a DLP policy with a built-in sensitive info type for credit card numbers, the administrator can block users from sharing documents containing that data, either by preventing the action or triggering a notification. This directly addresses the compliance requirement to block sharing of documents with credit card numbers.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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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