SC-900 Describe the capabilities of Microsoft Entra Practice Question
A user reports that they are unable to sign in to a SaaS application that is configured for single sign-on (SSO) with Microsoft Entra ID. The user can sign in to other applications. What should you check first?
⚠ Common exam trap
Many candidates confuse global authentication issues (like disabled accounts or password problems) with application-specific authorization, which is governed by user assignment in Entra ID, not by the user's overall account state or licensing.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check if the user is assigned to the application in Microsoft Entra ID.
The most common cause of SSO failure for a single application, when the user can sign in to other apps, is that the user has not been assigned to that specific application in Microsoft Entra ID. Without explicit assignment, the user cannot authenticate via SSO even if their account is active and licensed. This is a core requirement for application-level access control in Entra ID.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Confirm the user's account is not disabled.
Why it's wrong here
A disabled account in Microsoft Entra ID would prevent the user from signing into *any* application integrated with Entra ID, not just a single SaaS app. Since the user can successfully authenticate to other applications, their account is active and functional, making this an unlikely cause for the specific app access issue.
- ✗
Verify that the user has reset their password recently.
Why it's wrong here
A recent password reset is irrelevant if the user can successfully sign in to other applications using their current credentials. The ability to authenticate elsewhere confirms the password itself is valid and not expired or compromised, indicating the problem lies with the specific application's authorization, not the user's authentication credentials.
- ✗
Ensure the user has an appropriate Microsoft 365 license.
Why it's wrong here
While Microsoft 365 licenses grant access to specific Microsoft services, they typically do not govern access to third-party SaaS applications integrated with Microsoft Entra ID for single sign-on. Access to such external applications is generally controlled by explicit assignment within Entra ID, separate from any M365 licensing requirements for core Microsoft services.
- ✓
Check if the user is assigned to the application in Microsoft Entra ID.
Why this is correct
For most enterprise applications configured with Microsoft Entra ID for single sign-on, explicit user or group assignment is a mandatory authorization step. If a user is not assigned to the application, Microsoft Entra ID will deny access even if their authentication credentials are valid, preventing them from reaching the SaaS application.
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Related to this question
Learn chapter
Core Security Concepts
Key term
User
A user is any person, system, or device that interacts with an IT service, resource, or identity system, typically authenticated through credentials and authorized to perform specific actions.
Key term
Single sign-on
Single sign-on (SSO) is an authentication method that allows a user to log in once and gain access to multiple applications or systems without re-entering credentials.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SC-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 SC-900 exam.