Quick Answer
The answer is to enable Microsoft Entra Seamless SSO via Microsoft Entra Connect. This is correct because Seamless SSO allows hybrid identities to authenticate against on-premises Active Directory using Kerberos tickets, enabling legacy applications that cannot use modern protocols like SAML or OAuth to verify users without prompting for passwords. On the Microsoft Cybersecurity Architect exam, this scenario tests your understanding of how to bridge on-premises Kerberos dependencies with cloud identity—a common trap is assuming federation (ADFS) is required, but Seamless SSO handles Kerberos directly without extra infrastructure. Remember that Password Hash Sync (PHS) and Pass-through Authentication (PTA) lack Kerberos delegation capabilities, making them unsuitable for legacy app compatibility. A useful memory tip: think of Seamless SSO as the "Kerberos bridge" that lets old apps talk to the new cloud without a federation detour.
This SC-100 practice question tests your understanding of design security solutions for infrastructure. 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 is migrating on-premises Active Directory to Microsoft Entra ID. You need to design the authentication method to support hybrid identities with seamless single sign-on (SSO) for legacy applications that require Kerberos authentication. What should you implement?
Federate Microsoft Entra ID with on-premises Active Directory using ADFS.
Why wrong: Federation is not needed for Seamless SSO.
Use password hash synchronization (PHS) only.
Why wrong: PHS does not provide Seamless SSO.
Deploy pass-through authentication (PTA).
Why wrong: PTA does not support Kerberos-based Seamless SSO.
Enable Microsoft Entra Seamless SSO via Microsoft Entra Connect.
This provides Kerberos-based SSO for hybrid users.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable Microsoft Entra Seamless SSO via Microsoft Entra Connect.
Option D is correct because Microsoft Entra Connect with Seamless SSO enables Kerberos-based authentication for hybrid users. Option A is wrong because federation with ADFS is not required for Kerberos. Option B is wrong because PHS does not support Kerberos delegation. Option C is wrong because PTA does not support Kerberos.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Federate Microsoft Entra ID with on-premises Active Directory using ADFS.
Why it's wrong here
Federation is not needed for Seamless SSO.
Use password hash synchronization (PHS) only.
Why it's wrong here
PHS does not provide Seamless SSO.
Deploy pass-through authentication (PTA).
Why it's wrong here
PTA does not support Kerberos-based Seamless SSO.
Enable Microsoft Entra Seamless SSO via Microsoft Entra Connect.
Why this is correct
This provides Kerberos-based SSO for hybrid users.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which SC-100 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.
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FAQ
Design security solutions for infrastructure — This question tests Design security solutions for infrastructure — Read the scenario before looking for a memorised answer..
The correct answer is: Enable Microsoft Entra Seamless SSO via Microsoft Entra Connect. — Option D is correct because Microsoft Entra Connect with Seamless SSO enables Kerberos-based authentication for hybrid users. Option A is wrong because federation with ADFS is not required for Kerberos. Option B is wrong because PHS does not support Kerberos delegation. Option C is wrong because PTA does not support Kerberos.
Identify which SC-100 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.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Your organization is migrating on-premises Active Directory to Microsoft Entra ID. You need to ensure that users can authenticate to on-premises resources using their Entra ID credentials. Which feature should you implement?
mediumWhy B: Option A is correct because Microsoft Entra ID with Password Hash Sync allows users to use the same password for cloud and on-premises resources. Option B is wrong because Pass-through Authentication does not sync passwords. Option C is wrong because Federation requires an on-premises identity provider. Option D is wrong because Microsoft Entra Connect Health monitors synchronization health.
Variation 2. Your organization is migrating from on-premises Active Directory to Microsoft Entra ID. You need to design a solution for hybrid identity that supports seamless SSO for legacy applications that require Kerberos authentication. Which THREE components should you include in your design?
hardWhy B: Option A (Microsoft Entra Connect) enables synchronization and seamless SSO. Option C (Password hash sync) is required for seamless SSO. Option D (Enterprise App registration) allows legacy apps to use Microsoft Entra ID for authentication. Option B (AD FS) is optional and not required; Option E (Azure AD Application Proxy) is for remote access, not Kerberos SSO.
Last reviewed: Jun 21, 2026
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