This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: sSO allows a user to authenticate once and gain access to multiple applications.. 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.
A tenant administrator is advising a department that wants to let users sign in once and access connected Microsoft 365 and SaaS apps. Microsoft security, identity, or compliance capability should it use?
Microsoft Planner
Why wrong: Planner manages tasks and does not provide this security or compliance control.
Microsoft Forms
Why wrong: Forms creates surveys and quizzes, not this security or compliance capability.
Microsoft Stream
Why wrong: Stream hosts video content and does not meet this requirement.
Single sign-on (SSO)
SSO allows users to authenticate once and access connected applications.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Single sign-on (SSO)
Single sign-on (SSO) enables users to authenticate once and gain access to multiple applications, including Microsoft 365 and third-party SaaS apps, without re-entering credentials. This is achieved through federation protocols such as SAML 2.0 or OpenID Connect, which allow the identity provider (Azure AD) to issue security tokens to relying party applications. SSO is the correct Microsoft security and identity capability for this requirement.
Key principle: SSO allows a user to authenticate once and gain access to multiple applications.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Microsoft Planner
Why it's wrong here
Planner manages tasks and does not provide this security or compliance control.
Microsoft Forms
Why it's wrong here
Forms creates surveys and quizzes, not this security or compliance capability.
Microsoft Stream
Why it's wrong here
Stream hosts video content and does not meet this requirement.
Single sign-on (SSO)
Why this is correct
SSO allows users to authenticate once and access connected applications.
Related concept
SSO allows a user to authenticate once and gain access to multiple applications.
Common exam traps
The trap here is that candidates may confuse productivity tools (Planner, Forms, Stream) with security/identity capabilities, failing to recognize that SSO is the specific feature designed for unified authentication across multiple apps.
Detailed technical explanation
SSO in Microsoft 365 relies on Azure Active Directory as the identity provider, supporting federation via SAML 2.0, WS-Federation, and OpenID Connect. When a user signs in, Azure AD issues a token that is validated by each connected SaaS app, eliminating the need for separate credentials. In a real-world scenario, an organization using Salesforce can configure SAML-based SSO with Azure AD, so users authenticate once and access both Office 365 and Salesforce without additional prompts.
Key takeaway
SSO allows a user to authenticate once and gain access to multiple applications.
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
Review sSO allows a user to authenticate once and gain access to multiple applications., then practise related MS-900 questions on the same topic to reinforce the concept.
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FAQ
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — SSO allows a user to authenticate once and gain access to multiple applications..
The correct answer is: Single sign-on (SSO) — Single sign-on (SSO) enables users to authenticate once and gain access to multiple applications, including Microsoft 365 and third-party SaaS apps, without re-entering credentials. This is achieved through federation protocols such as SAML 2.0 or OpenID Connect, which allow the identity provider (Azure AD) to issue security tokens to relying party applications. SSO is the correct Microsoft security and identity capability for this requirement.
Review sSO allows a user to authenticate once and gain access to multiple applications., then practise related MS-900 questions on the same topic to reinforce the concept.
SSO allows a user to authenticate once and gain access to multiple applications.
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Last reviewed: Jun 11, 2026
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