This SC-900 practice question tests your understanding of describe the capabilities of microsoft entra. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Your company is implementing a passwordless authentication strategy. You want users to be able to sign in using the Microsoft Authenticator app on their mobile devices. Which Microsoft Entra feature should you enable?
Windows Hello for Business
Why wrong: Windows Hello is for Windows devices, not mobile.
Passwordless phone sign-in with Microsoft Authenticator
This allows users to sign in using the Authenticator app on their phone.
FIDO2 security keys
Why wrong: FIDO2 is a hardware security key method, not the mobile app.
Temporary Access Pass
Why wrong: Temporary Access Pass is for passwordless sign-in in specific scenarios like provisioning.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Passwordless phone sign-in with Microsoft Authenticator
Passwordless phone sign-in with Microsoft Authenticator allows users to sign in without entering a password by approving a notification or entering a number displayed on the screen. This directly aligns with the requirement to use the Microsoft Authenticator app on mobile devices for a passwordless authentication strategy.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Windows Hello for Business
Why it's wrong here
Windows Hello is for Windows devices, not mobile.
Passwordless phone sign-in with Microsoft Authenticator
Why this is correct
This allows users to sign in using the Authenticator app on their phone.
Related concept
Read the scenario before looking for a memorised answer.
FIDO2 security keys
Why it's wrong here
FIDO2 is a hardware security key method, not the mobile app.
Temporary Access Pass
Why it's wrong here
Temporary Access Pass is for passwordless sign-in in specific scenarios like provisioning.
Common exam traps
The trap here is that candidates may confuse 'passwordless' with any non-password method, but the question specifically requires the Microsoft Authenticator app, which eliminates Windows Hello for Business (device-bound) and FIDO2 (hardware-bound) as valid options.
Trap categories for this question
Scenario analysis trap
Temporary Access Pass is for passwordless sign-in in specific scenarios like provisioning.
Detailed technical explanation
Passwordless phone sign-in uses asymmetric key cryptography: the Microsoft Authenticator app generates a key pair, and the private key remains on the device. During sign-in, the server sends a challenge that the app signs with the private key, which is unlocked by a biometric or PIN on the phone. This eliminates the need for a password to be transmitted or stored, reducing credential theft risk.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
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FAQ
Describe the capabilities of Microsoft Entra — This question tests Describe the capabilities of Microsoft Entra — Read the scenario before looking for a memorised answer..
The correct answer is: Passwordless phone sign-in with Microsoft Authenticator — Passwordless phone sign-in with Microsoft Authenticator allows users to sign in without entering a password by approving a notification or entering a number displayed on the screen. This directly aligns with the requirement to use the Microsoft Authenticator app on mobile devices for a passwordless authentication strategy.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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