- A
Use Microsoft Defender for Identity to disable the account.
Why wrong: Microsoft Defender for Identity does not have a built-in action to disable accounts; it only provides alerts.
- B
Reset the account password and enforce a sign-out.
Why wrong: Resetting the password does not kill existing Kerberos tickets; the account may continue to use cached tickets.
- C
Disable the account in Microsoft Entra ID (if synced) or Active Directory.
Disabling the account immediately revokes access and prevents further authentication.
- D
Remove the account from the Domain Admins group.
Why wrong: The account may still have DCSync privileges if delegated separately.
Question 687 of 1,639
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.
Your organization uses Microsoft Sentinel and Microsoft Defender for Identity. An alert fires for a potential DCSync attack. The incident response team needs to immediately block the source account from performing directory replication. Which action should be taken?
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 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
✓
Disable the account in Microsoft Entra ID (if synced) or Active Directory.
Option C is correct because immediately disabling the account in Microsoft Entra ID (if synced) or Active Directory is the fastest way to stop the compromised account from performing any directory replication, including DCSync attacks. DCSync abuses the domain controller's replication protocol (MS-DRSR) to request password hashes, and disabling the account blocks all Kerberos and NTLM authentication, effectively halting the attack at the source.
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.
- ✗
Use Microsoft Defender for Identity to disable the account.
Why it's wrong here
Microsoft Defender for Identity does not have a built-in action to disable accounts; it only provides alerts.
- ✗
Reset the account password and enforce a sign-out.
Why it's wrong here
Resetting the password does not kill existing Kerberos tickets; the account may continue to use cached tickets.
- ✓
Disable the account in Microsoft Entra ID (if synced) or Active Directory.
Why this is correct
Disabling the account immediately revokes access and prevents further authentication.
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.
- ✗
Remove the account from the Domain Admins group.
Why it's wrong here
The account may still have DCSync privileges if delegated separately.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume resetting the password is sufficient to stop an attack, but they overlook that cached Kerberos tickets or active replication sessions can persist, making immediate account disablement the only surefire way to block DCSync in real time.
Detailed technical explanation
How to think about this question
DCSync exploits the MS-DRSR (Directory Replication Service Remote Protocol) to simulate a domain controller and request replication of sensitive data, including NTLM hashes and Kerberos keys. The attack requires the account to have the 'Replicate Directory Changes' and 'Replicate Directory Changes All' extended rights, which are often granted to Domain Admins, Enterprise Admins, and specific service accounts. Disabling the account immediately invalidates its Kerberos TGT and NTLM authentication, cutting off any ongoing or future DRSR requests, whereas password reset alone does not revoke already-issued Kerberos tickets that may still be valid for up to 10 hours by default.
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 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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this SC-200 question test?
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: Disable the account in Microsoft Entra ID (if synced) or Active Directory. — Option C is correct because immediately disabling the account in Microsoft Entra ID (if synced) or Active Directory is the fastest way to stop the compromised account from performing any directory replication, including DCSync attacks. DCSync abuses the domain controller's replication protocol (MS-DRSR) to request password hashes, and disabling the account blocks all Kerberos and NTLM authentication, effectively halting the attack at the source.
What should I do if I get this SC-200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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Last reviewed: Jul 4, 2026
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