The answer is Azure AD Connect. This service is the correct choice because it is Microsoft’s dedicated tool for synchronizing on-premises Active Directory identities with Azure Active Directory, enabling hybrid identity scenarios where users can access both local and cloud resources with a single set of credentials. It handles core synchronization tasks like password hash sync, pass-through authentication, and federation integration, bridging the gap between your on-premises environment and Azure AD. On the AZ-900 exam, this question tests your understanding of hybrid identity solutions, often appearing as a straightforward “which tool does this?” item. A common trap is confusing Azure AD Connect with Azure AD Domain Services or simply Azure AD itself—remember that Azure AD Connect is the *bridge* that syncs identities, not the cloud directory. A helpful memory tip: think of “Connect” as the connector cable linking your on-premises directory to the cloud, ensuring seamless single sign-on and identity consistency.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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.
Which Azure service enables you to synchronize your on-premises Active Directory with Azure Active Directory?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure AD Connect
Azure AD Connect is the correct service because it is specifically designed to synchronize on-premises Active Directory identities with Azure Active Directory, enabling hybrid identity scenarios. It handles password hash synchronization, pass-through authentication, and federation integration, ensuring users have a single identity for both on-premises and cloud resources.
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.
✗
Azure AD Domain Services
Why it's wrong here
AD Domain Services provides managed domain services in Azure; AD Connect syncs on-premises identities to Azure AD.
✗
Azure AD B2C
Why it's wrong here
B2C is for consumer identity management; AD Connect syncs corporate directory to Azure AD.
✓
Azure AD Connect
Why this is correct
Azure AD Connect synchronizes on-premises Active Directory identities to Azure AD for hybrid identity.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Multi-Factor Authentication
Why it's wrong here
MFA adds a second authentication factor; it does not synchronize directory identities.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure AD Connect (synchronization tool) with Azure AD Domain Services (managed domain services), as both involve Active Directory, but they serve entirely different purposes.
Detailed technical explanation
How to think about this question
Azure AD Connect uses the DirSync engine and supports multiple synchronization methods, including password hash sync (using SHA-256 hashing), pass-through authentication (via an on-premises agent), and federation with Active Directory Federation Services (AD FS). In real-world deployments, organizations often combine Azure AD Connect with seamless single sign-on (SSO) to allow users to access cloud apps without re-entering credentials, leveraging Kerberos delegation.
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 AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure AD Connect — Azure AD Connect is the correct service because it is specifically designed to synchronize on-premises Active Directory identities with Azure Active Directory, enabling hybrid identity scenarios. It handles password hash synchronization, pass-through authentication, and federation integration, ensuring users have a single identity for both on-premises and cloud resources.
What should I do if I get this AZ-900 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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