The correct answer is to create an IP address-based access policy in Microsoft Defender for Cloud Apps. This works because Defender for Cloud Apps acts as a Cloud Access Security Broker (CASB), allowing granular control over app sessions and access based on real-time signals like IP reputation, directly from the alert interface. On the SC-200 exam, this scenario tests your understanding of where to enforce IP blocking for sanctioned apps—Defender for Cloud Apps policies, not Microsoft Entra ID Conditional Access, which governs broader sign-in risk. A common trap is confusing the two: remember that Conditional Access policies are set in Entra ID and require a license like P2, while Defender for Cloud Apps IP policies are applied directly within the CASB session. To block an IP address access in Defender for Cloud Apps, think "CASB for the app, Entra for the user." A quick memory tip: "IP in the app, go to CASB; IP in the tenant, go to Entra."
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 security analyst receives a Microsoft Defender for Cloud Apps alert about a suspicious sign-in from an IP address in a sanctioned app. The analyst needs to immediately prevent further access from that IP. What should the analyst do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an IP address-based access policy in Microsoft Defender for Cloud Apps.
Option C is correct because creating an IP-based access policy in Defender for Cloud Apps allows blocking the specific IP. Option A is wrong because Conditional Access policies are managed in Microsoft Entra ID, not directly from the alert. Option B is wrong because resetting the user's password does not block the IP. Option D is wrong because a mailbox rule cannot block IP access.
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.
✗
Create a mailbox rule to delete emails from that IP.
Why it's wrong here
Mailbox rules do not control access to cloud apps.
✗
Create a Conditional Access policy in Microsoft Entra ID to block the IP.
Why it's wrong here
Conditional Access policies are not directly created from a Defender for Cloud Apps alert.
✓
Create an IP address-based access policy in Microsoft Defender for Cloud Apps.
Why this is correct
Access policies in Defender for Cloud Apps can block specific IPs.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Reset the user's password and require MFA re-registration.
Why it's wrong here
Resetting password does not block the IP address.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-200 question in full detail.
Identify which SC-200 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Respond to security incidents — This question tests Respond to security incidents — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an IP address-based access policy in Microsoft Defender for Cloud Apps. — Option C is correct because creating an IP-based access policy in Defender for Cloud Apps allows blocking the specific IP. Option A is wrong because Conditional Access policies are managed in Microsoft Entra ID, not directly from the alert. Option B is wrong because resetting the user's password does not block the IP. Option D is wrong because a mailbox rule cannot block IP access.
What should I do if I get this SC-200 question wrong?
Identify which SC-200 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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