The answer is Azure AD Connect, the correct service because it synchronizes your on-premises Active Directory identities with Azure AD, enabling hybrid identity scenarios where users authenticate once for both local and cloud resources. This tool handles password hash synchronization, pass-through authentication, and federation integration, effectively extending your existing directory to the cloud without requiring a separate identity store. On the AZ-900 exam, this question tests your understanding of hybrid identity solutions, often appearing as a straightforward concept question where the trap is confusing Azure AD Connect with Azure AD itself—remember, Azure AD is the cloud directory, while Azure AD Connect is the bridge that links it to your on-premises AD. A helpful memory tip: think of “Connect” as the connector cable that plugs your on-premises directory into the cloud, making hybrid identity seamless.
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 allows you to extend your on-premises Active Directory to the cloud for hybrid identity scenarios?
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 synchronizes on-premises Active Directory identities with Azure AD, enabling hybrid identity scenarios where users can use the same credentials for both on-premises and cloud resources. It handles password hash synchronization, pass-through authentication, and federation integration, making it the primary tool for extending on-premises AD to the cloud.
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 B2C
Why it's wrong here
Azure AD B2C is for customer identity management — not for synchronizing on-premises AD to the cloud.
✓
Azure AD Connect
Why this is correct
Azure AD Connect synchronizes on-premises AD user accounts and groups to Azure AD, enabling hybrid identity with SSO.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Active Directory Domain Services
Why it's wrong here
Azure AD DS provides domain services in the cloud — Azure AD Connect is the tool that syncs identities from on-premises AD.
✗
Azure Conditional Access
Why it's wrong here
Conditional Access enforces access policies — it requires an identity source but doesn't sync on-premises identities.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing Azure AD Domain Services (Azure AD DS) with Azure AD Connect, as both involve 'domain' concepts, but Azure AD DS provides managed domain services for cloud workloads without extending on-premises AD, while Azure AD Connect is the actual synchronization tool for hybrid identity.
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) and pass-through authentication (using a lightweight agent). In a real-world scenario, organizations often use Azure AD Connect with federation (e.g., AD FS) to enable seamless single sign-on while maintaining on-premises control, but the synchronization itself is the core mechanism for hybrid identity.
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 synchronizes on-premises Active Directory identities with Azure AD, enabling hybrid identity scenarios where users can use the same credentials for both on-premises and cloud resources. It handles password hash synchronization, pass-through authentication, and federation integration, making it the primary tool for extending on-premises AD to the cloud.
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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