The answer is Azure Active Directory (Azure AD). This is correct because Azure AD is Microsoft’s cloud-based identity and access management service that delivers both single sign-on (SSO) and multi-factor authentication (MFA) for cloud and on-premises applications, allowing users to authenticate once and access multiple resources while MFA adds a critical second layer of security through methods like phone calls or app notifications. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of core identity services, often appearing in questions that contrast Azure AD with on-premises Active Directory or other authentication options; a common trap is confusing Azure AD with Azure AD Domain Services, which handles legacy domain joins rather than SSO and MFA. Remember the memory tip: “Azure AD is the identity gatekeeper—one key (SSO) with a second lock (MFA).”
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 identity service provides single sign-on (SSO) and multi-factor authentication (MFA) for cloud and on-premises applications?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Active Directory (Azure AD)
Azure Active Directory (Azure AD) is Microsoft's cloud-based identity and access management service that provides single sign-on (SSO) and multi-factor authentication (MFA) for both cloud and on-premises applications. It enables users to sign in once and access multiple resources, while MFA adds an extra layer of security by requiring additional verification methods like a phone call or app notification.
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 (LDAP, Kerberos) but is not the primary SSO/MFA service.
✓
Azure Active Directory (Azure AD)
Why this is correct
Azure AD provides SSO, MFA, conditional access, and identity management for cloud and on-premises apps.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Key Vault
Why it's wrong here
Key Vault manages secrets and encryption keys, not identity and SSO.
✗
Azure Information Protection
Why it's wrong here
Azure Information Protection classifies and protects documents, not identity authentication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse Azure AD Domain Services (which sounds similar to Azure AD) as the identity provider for SSO and MFA, but it only provides domain join and LDAP services, not cloud authentication features.
Detailed technical explanation
How to think about this question
Azure AD uses industry-standard protocols such as OAuth 2.0, OpenID Connect, and SAML 2.0 to enable SSO across thousands of pre-integrated SaaS applications and custom apps. For MFA, Azure AD supports conditional access policies that can enforce MFA based on user risk, location, or device state, and it integrates with on-premises Active Directory via Azure AD Connect for hybrid identity scenarios. A subtle behavior is that Azure AD's SSO can work with password hash synchronization, pass-through authentication, or federation (e.g., ADFS), each with different security and latency trade-offs.
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 Active Directory (Azure AD) — Azure Active Directory (Azure AD) is Microsoft's cloud-based identity and access management service that provides single sign-on (SSO) and multi-factor authentication (MFA) for both cloud and on-premises applications. It enables users to sign in once and access multiple resources, while MFA adds an extra layer of security by requiring additional verification methods like a phone call or app notification.
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.
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 →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This AZ-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 AZ-900 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.