The answer is to reset the krbtgt account password twice, which forces all Kerberos tickets to be invalidated and immediately contains credential theft. This works because the krbtgt account is the Key Distribution Center’s service account; resetting its password twice (with a 10-minute wait between resets) invalidates all existing Ticket-Granting Tickets (TGTs), preventing the compromised domain admin from reusing stolen tickets or performing pass-the-ticket attacks. On the SC-200 exam, this scenario tests your ability to prioritize containment over remediation in a hybrid environment, especially when policy restricts disabling accounts. A common trap is choosing to reset only the domain admin password, which does not revoke already-issued Kerberos tickets, or isolating the domain controller, which disrupts authentication. Memory tip: think “two resets, no tickets”—the double reset is the only way to force a full Kerberos trust rebuild without disabling accounts.
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. 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.
Fabrikam has a hybrid environment with on-premises Active Directory synced to Microsoft Entra ID. They use Microsoft Sentinel and Microsoft Defender XDR. A critical incident is opened: 'Credential theft detected - domain admin account compromised.' The incident includes alerts from Microsoft Defender for Identity (MDI) showing anomalous Kerberos ticket requests and from Microsoft Defender for Endpoint showing a process dump on a domain controller. You need to contain the incident immediately. The organization has a strict policy of not disabling the domain admin account without approval due to critical dependencies. Which of the following is the BEST course of action?
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.
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
✓
Reset the krbtgt account password twice to force Kerberos ticket invalidation.
Option A is correct: resetting the krbtgt account password twice forces all Kerberos tickets to be invalidated, effectively containing credential theft without disabling the account. Option B is wrong because isolating the domain controller would disrupt services. Option C is wrong because resetting the domain admin password alone does not invalidate existing Kerberos tickets. Option D is wrong because disabling the account violates policy.
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.
✗
Reset the domain admin password and revoke sessions in Microsoft Entra ID.
Why it's wrong here
This does not invalidate existing Kerberos tickets.
✗
Disable the domain admin account temporarily.
Why it's wrong here
This violates the organization's policy.
✗
Isolate the domain controller using Microsoft Defender for Endpoint.
Why it's wrong here
Isolation would disrupt authentication and other critical services.
✓
Reset the krbtgt account password twice to force Kerberos ticket invalidation.
Why this is correct
This invalidates all existing Kerberos tickets, cutting off attacker access.
Clue confirmation
The clue words "best", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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 krbtgt account password twice to force Kerberos ticket invalidation. — Option A is correct: resetting the krbtgt account password twice forces all Kerberos tickets to be invalidated, effectively containing credential theft without disabling the account. Option B is wrong because isolating the domain controller would disrupt services. Option C is wrong because resetting the domain admin password alone does not invalidate existing Kerberos tickets. Option D is wrong because disabling the account violates policy.
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: "best", "immediately / without restart". 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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