How DLP Prevents External Sharing of Documents with Credit Card Numbers
This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. 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.
Refer to the exhibit. A Microsoft Purview DLP policy is configured. When a user attempts to share a document containing a credit card number externally, what will happen?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The sharing attempt is blocked and the user receives a notification.
The exhibit shows a Microsoft Purview DLP policy configured with a 'Block' action for sharing documents containing credit card numbers externally. When the action is set to 'Block', the sharing attempt is prevented, and the user receives a notification explaining why the action was blocked. This aligns with the default behavior of DLP policies that enforce restrictive actions on sensitive data.
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.
✗
The document is shared but the user is notified.
Why it's wrong here
BlockAccess prevents sharing.
✓
The sharing attempt is blocked and the user receives a notification.
Why this is correct
Both actions are specified in the policy rule.
Related concept
Read the scenario before looking for a memorised answer.
✗
The document is encrypted before sharing.
Why it's wrong here
No encryption action is configured.
✗
The policy has no effect because no severity level is set.
Why it's wrong here
DLP policies do not require a severity level to block.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume a missing severity level disables the policy, but in Microsoft Purview DLP, severity is only for reporting and alerting—the configured actions (e.g., Block, Notify) are enforced independently of severity settings.
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Purview DLP uses content analysis via the Microsoft 365 data classification service, which scans for sensitive information types like credit card numbers using regex patterns and checksum validation (e.g., Luhn algorithm). The 'Block' action leverages the Exchange Online and SharePoint Online transport rules to intercept the sharing attempt at the service level, preventing the document from being sent externally. In a real-world scenario, if a user tries to share via email, the DLP policy triggers a policy tip in Outlook on the web, blocking the send and displaying a customizable notification.
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 SC-900 question in full detail.
Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The sharing attempt is blocked and the user receives a notification. — The exhibit shows a Microsoft Purview DLP policy configured with a 'Block' action for sharing documents containing credit card numbers externally. When the action is set to 'Block', the sharing attempt is prevented, and the user receives a notification explaining why the action was blocked. This aligns with the default behavior of DLP policies that enforce restrictive actions on sensitive data.
What should I do if I get this SC-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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