The answer is Microsoft Entra Connect. This tool is the correct choice for synchronizing on-premises Active Directory to Microsoft Entra ID because it serves as the dedicated synchronization engine that bridges your local identity infrastructure with the cloud, handling core tasks like password hash synchronization, pass-through authentication, and federation setup. On the Microsoft Cybersecurity Architect exam, this question tests your understanding of hybrid identity design, often appearing as a straightforward scenario where you must select the primary tool for a single-forest, single-tenant environment—a common trap is confusing it with older tools like DirSync or Azure AD Sync, which are now deprecated. Remember that Entra Connect is the modern, full-featured solution that also supports password writeback and device sync. A simple memory tip: think of Entra Connect as the "bridge" that connects your on-premises AD forest directly to your Entra ID tenant.
SC-100 Practice Question: Design security operations, identity, and compliance capabilities
This SC-100 practice question tests your understanding of design security operations, identity, and compliance capabilities. 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 need to design a solution to synchronize on-premises Active Directory users to Microsoft Entra ID for hybrid identity. Which tool should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Entra Connect
Microsoft Entra Connect is the correct tool for synchronizing on-premises Active Directory users to Microsoft Entra ID for hybrid identity because it provides a comprehensive, full-featured synchronization engine that supports password hash synchronization, pass-through authentication, and federation integration. It is the primary tool for hybrid identity scenarios where you need to synchronize a single on-premises AD forest to a single Entra ID tenant, handling attributes, password writeback, and device synchronization.
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.
✗
Microsoft Identity Manager (MIM)
Why it's wrong here
MIM is used for advanced identity management, not primarily for synchronization.
✓
Microsoft Entra Connect
Why this is correct
Microsoft Entra Connect is the primary tool for synchronizing on-premises AD to Entra ID.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft Entra Connect Cloud Sync
Why it's wrong here
Cloud Sync is for specific scenarios like merging multiple forests, but the standard sync tool is Entra Connect.
✗
Active Directory Federation Services (AD FS)
Why it's wrong here
AD FS provides federation, not directory synchronization.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Entra Connect Cloud Sync with the full Entra Connect tool, assuming the 'Cloud Sync' name implies it is the primary or newer replacement, but in reality, Entra Connect Cloud Sync is a lighter agent for specific multi-forest or limited scenarios, while Entra Connect remains the standard for full hybrid identity synchronization.
Trap categories for this question
Scenario analysis trap
Cloud Sync is for specific scenarios like merging multiple forests, but the standard sync tool is Entra Connect.
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Entra Connect uses the DirSync engine (based on the MIIS/FIM/MIM synchronization engine) to read objects from on-premises AD via LDAP and write them to Entra ID via the Graph API, handling delta synchronization through change tracking using the USN (Update Sequence Number) and the DirSync control. A subtle behavior is that Entra Connect uses a staging mode to test synchronization before going live, and it requires the on-premises AD schema to be extended with the Microsoft Exchange schema attributes if you plan to synchronize mail-enabled objects, which can cause schema conflicts if not planned carefully.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-100 question in full detail.
Design security operations, identity, and compliance capabilities — This question tests Design security operations, identity, and compliance capabilities — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Entra Connect — Microsoft Entra Connect is the correct tool for synchronizing on-premises Active Directory users to Microsoft Entra ID for hybrid identity because it provides a comprehensive, full-featured synchronization engine that supports password hash synchronization, pass-through authentication, and federation integration. It is the primary tool for hybrid identity scenarios where you need to synchronize a single on-premises AD forest to a single Entra ID tenant, handling attributes, password writeback, and device synchronization.
What should I do if I get this SC-100 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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