MS-900 Practice Question: Describe security, compliance, privacy, and trust in Microsoft 365
This MS-900 practice question tests your understanding of describe security, compliance, privacy, and trust in microsoft 365. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: microsoft Entra ID is the identity and access management service for Microsoft 365.. 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 business stakeholder asks how Microsoft 365 can help them allow sign-in using biometrics or FIDO2 security keys. Microsoft security, identity, or compliance capability should it use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Entra ID passwordless authentication
Microsoft Entra ID passwordless authentication (Option B) is the correct capability because it directly supports sign-in using biometrics (Windows Hello, Microsoft Authenticator) and FIDO2 security keys. This feature eliminates the need for passwords by leveraging public-key cryptography and the WebAuthn standard, aligning with the stakeholder's request for passwordless sign-in methods.
Key principle: Microsoft Entra ID is the identity and access management service for Microsoft 365.
Answer analysis
Option-by-option breakdown
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 Entra ID passwordless authentication
Why this is correct
Microsoft Entra ID supports passwordless methods such as Windows Hello for Business and FIDO2 security keys.
Related concept
Microsoft Entra ID is the identity and access management service for Microsoft 365.
✗
Microsoft Stream
Why it's wrong here
Stream hosts video content and does not meet this requirement.
✗
Microsoft Forms
Why it's wrong here
Forms creates surveys and quizzes, not this security or compliance capability.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse productivity tools (Planner, Stream, Forms) with identity and access management capabilities, failing to recognize that passwordless authentication is a core feature of Microsoft Entra ID, not a standalone app.
Detailed technical explanation
How to think about this question
Under the hood, Microsoft Entra ID passwordless authentication uses the WebAuthn API and FIDO2 CTAP2 protocols to create a key pair on the FIDO2 security key or TPM module, with the private key never leaving the device. In a real-world scenario, a user registers a FIDO2 key by generating an attestation statement during enrollment, and subsequent sign-ins involve a challenge-response authentication that verifies possession of the private key without transmitting a password over the network.
KKey Concepts to Remember
Microsoft Entra ID is the identity and access management service for Microsoft 365.
Passwordless authentication eliminates the need for traditional passwords.
Windows Hello for Business uses biometrics (face, fingerprint) for sign-in.
FIDO2 security keys are hardware-based, phishing-resistant authenticators.
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
Microsoft Entra ID is the identity and access management service for Microsoft 365.
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 MS-900 question in full detail.
Review microsoft Entra ID is the identity and access management service for Microsoft 365., then practise related MS-900 questions on the same topic to reinforce the concept.
Describe security, compliance, privacy, and trust in Microsoft 365 — This question tests Describe security, compliance, privacy, and trust in Microsoft 365 — Microsoft Entra ID is the identity and access management service for Microsoft 365..
What is the correct answer to this question?
The correct answer is: Microsoft Entra ID passwordless authentication — Microsoft Entra ID passwordless authentication (Option B) is the correct capability because it directly supports sign-in using biometrics (Windows Hello, Microsoft Authenticator) and FIDO2 security keys. This feature eliminates the need for passwords by leveraging public-key cryptography and the WebAuthn standard, aligning with the stakeholder's request for passwordless sign-in methods.
What should I do if I get this MS-900 question wrong?
Review microsoft Entra ID is the identity and access management service for Microsoft 365., then practise related MS-900 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Microsoft Entra ID is the identity and access management service for Microsoft 365.
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Question Discussion
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