Microsoft Purview Data Loss Prevention: Block Emails with Confidential Phrases
A company needs to ensure that employees cannot share sensitive financial reports with external parties via email. They want to automatically detect and block emails that contain the phrase 'Confidential-Financial' in the subject line or body, regardless of the recipient's domain. Which Microsoft Purview solution should they configure?
Quick Answer
The answer is Microsoft Purview Data Loss Prevention (DLP). DLP is the correct choice because it allows you to create a policy that inspects both the subject line and body of an email for specific phrases like 'Confidential-Financial', and then automatically blocks the message from being sent—regardless of whether the recipient's domain is internal or external. This capability is central to preventing unauthorized sharing of sensitive financial reports, as DLP policies enforce actions such as blocking delivery or sending a notification to the user. On the SC-900 exam, this scenario tests your understanding of how DLP differs from other solutions like Information Protection or Insider Risk Management; a common trap is confusing DLP with sensitivity labels, but remember that DLP focuses on *detecting and blocking* content in transit, not just classifying it. For a quick memory tip, think "DLP = Detect, Lock, Prevent"—it actively stops the email from leaving your organization.
⚠ Common exam trap
It's easy for candidates to confuse Information Protection (sensitivity labels) with DLP, thinking labels alone can block emails, but labels only classify and encrypt—blocking requires a DLP policy to enforce actions based on label conditions or content matches.
Answer choices
Why each option matters
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 (DLP)
Microsoft Purview Data Loss Prevention (DLP) is the correct solution because it is specifically designed to detect and automatically block sensitive content—such as the phrase 'Confidential-Financial'—in emails, regardless of the recipient's domain. DLP policies can inspect subject lines and body text, then enforce actions like blocking delivery or notifying the user, making it ideal for preventing unauthorized external sharing of financial reports.
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 this is correct
DLP policies can be configured to detect custom phrases in emails and automatically block the email from being sent, protecting sensitive data from unauthorized sharing.
- ✗
Information Protection (sensitivity labels)
Why it's wrong here
Sensitivity labels classify and protect documents/emails, but they do not automatically block the transmission of content based on keyword detection; they rely on manual or automatic labeling.
- ✗
Data Lifecycle Management (retention policies)
Why it's wrong here
Retention policies manage how long content is kept and when it is deleted, but they do not detect or block sharing of sensitive information in real time.
- ✗
Audit
Why it's wrong here
Audit (Unified Audit Log) records user and admin activities for investigation, but it does not proactively block emails from being sent.
Go deeper
Related to this question
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Microsoft Entra ID
Key term
Data Loss Prevention
Data Loss Prevention (DLP) is a set of tools and processes that help organizations stop sensitive information from being shared, leaked, or stolen, whether accidentally or on purpose.
Key term
Microsoft Purview
Microsoft Purview is a unified data governance and compliance service that helps organizations discover, manage, and protect their data across on-premises, cloud, and hybrid environments.
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Same concept, more angles
1 more way this is tested on SC-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Your organization uses Microsoft 365 and wants to automatically quarantine suspicious emails before they reach users' inboxes. Which solution should you configure?
medium- A.Microsoft Purview Data Loss Prevention
- B.Microsoft Sentinel
- C.Microsoft Intune
- ✓ D.Microsoft Defender for Office 365
Why D: Microsoft Defender for Office 365 includes Exchange Online Protection (EOP) and advanced threat protection features such as Safe Attachments and Safe Links. These capabilities automatically quarantine suspicious emails—including those with malicious attachments, phishing URLs, or spoofed senders—before they reach user inboxes, based on policy-defined actions like 'Quarantine message'.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SC-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SC-900 exam.