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SC-900 Practice Question: Describe the capabilities of Microsoft security solutions

Your organization, Contoso Ltd., has a hybrid environment with on-premises Active Directory and Microsoft Entra ID. You are deploying Microsoft Defender for Identity (MDI) to protect against identity-based attacks. You have installed the MDI sensor on domain controllers and configured the service with the necessary permissions. After installation, you notice that MDI is not generating alerts for pass-the-hash attacks. You have verified that the sensors are healthy and that audit policies are correctly configured. You need to ensure that MDI can detect pass-the-hash attacks. What should you do?

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

Enable password hash synchronization in Microsoft Entra Connect

The current explanation states: "Enabling password hash synchronization (PHS) in Entra Connect allows MDI to analyze NTLM hashes and detect pass-the-hash attacks." This is incorrect. Password Hash Synchronization (PHS) is a method for synchronizing user password hashes from on-premises Active Directory to Microsoft Entra ID for cloud authentication purposes. MDI's detection of pass-the-hash attacks relies on monitoring NTLM authentication traffic and relevant security events on domain controllers, not on the hashes synchronized to Microsoft Entra ID via PHS. Therefore, enabling PHS does not enable or enhance MDI's ability to detect pass-the-hash attacks on-premises. Option B is wrong because the MDI sensor is already installed on domain controllers, and installing it on all servers is not the specific missing step for pass-the-hash detection. Option C is wrong because pass-the-hash attacks primarily leverage NTLM hashes, and while Kerberos logging is important for other attacks, it's not the primary mechanism for pass-the-hash detection. The stem also states audit policies are correctly configured. Option D is wrong because multi-factor authentication is a preventative control that strengthens authentication; it does not enable MDI to detect pass-the-hash attacks. Given that the sensors are healthy and audit policies are correctly configured, none of the provided options directly address a common missing configuration for MDI to detect pass-the-hash attacks.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Enable password hash synchronization in Microsoft Entra Connect

    Why this is correct

    Enabling password hash synchronization in Microsoft Entra Connect is correct because it allows Microsoft Defender for Identity to analyze NTLM hashes and detect pass-the-hash attacks.

  • Install the Azure ATP agent on all servers

    Why it's wrong here

    Installing the Azure ATP agent on all servers is incorrect because the MDI sensor (which replaced the Azure ATP agent) is already installed on domain controllers. Additional agents on servers are not required for pass-the-hash detection.

  • Enable Kerberos event logging on domain controllers

    Why it's wrong here

    Enabling Kerberos event logging on domain controllers is incorrect because pass-the-hash attacks exploit NTLM authentication, not Kerberos. MDI detects pass-the-hash through network traffic analysis of NTLM, so enabling Kerberos logging would not help.

  • Configure multi-factor authentication for all users

    Why it's wrong here

    Configuring multi-factor authentication for all users is incorrect because MFA is a preventive control that reduces the risk of credential theft, but it does not enable MDI to detect pass-the-hash attacks. Detection requires the technical configuration of PHS.

Visual reference

Client Server SYN (seq=100) SYN-ACK (seq=200, ack=101) ACK (ack=201) Connection established — data transfer begins

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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.