The correct first step is to reset the user’s password and revoke all active sessions. This immediately invalidates the compromised credentials, cutting off an attacker’s ability to reuse them for lateral movement or data access, which is the core technical concept behind containing compromised credentials after phishing. On the Microsoft Security Operations Analyst SC-200 exam, this scenario tests your understanding of the incident response priority: neutralizing the stolen authentication token before performing any other remediation. A common trap is choosing to block the phishing URL or delete the email, but those actions do not stop an attacker already holding valid credentials from logging in. Remember the memory tip: “Kill the key first”—always reset the password and revoke sessions before addressing the phishing artifact, because stolen credentials are the active threat.
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
You are responding to a phishing incident. The investigation reveals that a user clicked a link in a phishing email and entered credentials on a fake site. You need to contain the incident and prevent further compromise. What should you do first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Reset the user's password and revoke sessions.
Option D is correct because resetting the compromised user password immediately prevents further access using stolen credentials. Option A is wrong because blocking the URL does not invalidate already stolen credentials. Option B is wrong because deleting the email from the user's mailbox does not prevent use of stolen credentials. Option C is wrong because reporting the site to Microsoft is reactive.
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.
✗
Report the phishing site to Microsoft.
Why it's wrong here
Reporting helps others but does not address the immediate incident.
✗
Block the phishing URL in Microsoft Defender for Office 365.
Why it's wrong here
Blocking the URL prevents future clicks but does not contain the current compromise.
✓
Reset the user's password and revoke sessions.
Why this is correct
This invalidates the stolen credentials and existing sessions.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Delete the phishing email from the user's mailbox.
Why it's wrong here
Deleting the email does not invalidate the stolen credentials.
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: Reset the user's password and revoke sessions. — Option D is correct because resetting the compromised user password immediately prevents further access using stolen credentials. Option A is wrong because blocking the URL does not invalidate already stolen credentials. Option B is wrong because deleting the email from the user's mailbox does not prevent use of stolen credentials. Option C is wrong because reporting the site to Microsoft is reactive.
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: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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