Quick Answer
The answer is the Security keys (FIDO2) authentication method policy. This setting must be enabled within Microsoft Entra ID to allow users to register and manage their FIDO2 security keys through the My Security Info portal, as it directly controls the self-service registration experience, key restrictions, and user targeting for passwordless authentication. On the MS-102 exam, this question tests your understanding of how authentication method policies govern user-facing security info management, often appearing as a scenario where you must distinguish between enabling the policy itself versus configuring key restrictions or user scope. A common trap is confusing this with the broader “Passwordless Phone Sign-in” or “Microsoft Authenticator” settings, which handle different methods. Remember the direct link: FIDO2 registration in My Security Info requires the “Security keys (FIDO2)” policy to be turned on—think “FIDO2 = FIDO policy, not phone.”
This MS-102 practice question tests your understanding of implement and manage microsoft entra identity and access. 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.
Your organization uses Microsoft Entra ID and requires users to authenticate using FIDO2 security keys. You need to ensure that users can register and manage their security keys through the My Security Info portal. Which authentication method policy setting should you enable?
Temporary Access Pass
Why wrong: Temporary Access Pass is for passwordless sign-in via time-limited passcodes.
Certificate-based authentication
Why wrong: Certificate-based authentication uses X.509 certificates, not FIDO2 keys.
Security keys (FIDO2)
Security keys (FIDO2) policy enables FIDO2 key registration in My Security Info.
Microsoft Authenticator
Why wrong: Microsoft Authenticator is for phone sign-in, not FIDO2 keys.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Security keys (FIDO2)
The Security keys (FIDO2) authentication method policy must be enabled to allow users to register and manage FIDO2 security keys through the My Security Info portal. This policy controls the registration, key restrictions, and user targeting for FIDO2 authentication in Microsoft Entra ID, directly enabling the self-service management experience.
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.
Temporary Access Pass
Why it's wrong here
Temporary Access Pass is for passwordless sign-in via time-limited passcodes.
Certificate-based authentication
Why it's wrong here
Certificate-based authentication uses X.509 certificates, not FIDO2 keys.
Security keys (FIDO2)
Why this is correct
Security keys (FIDO2) policy enables FIDO2 key registration in My Security Info.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Authenticator
Why it's wrong here
Microsoft Authenticator is for phone sign-in, not FIDO2 keys.
Common exam traps
The trap here is that candidates confuse the authentication method policy that enables the feature (Security keys FIDO2) with the method used to authenticate after registration (like Microsoft Authenticator or Certificate-based authentication), leading them to pick an option that supports a different passwordless flow.
Detailed technical explanation
FIDO2 authentication relies on the WebAuthn standard and CTAP2 protocol, where the private key never leaves the security key hardware. The 'Security keys (FIDO2)' policy in Entra ID allows administrators to set key restrictions (e.g., AAGUID allowlisting) and target specific user groups, ensuring only compliant keys can be registered. A real-world scenario is enforcing that only FIDO2 keys from approved vendors (e.g., YubiKey) are usable, preventing unapproved hardware.
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
Implement and manage Microsoft Entra identity and access — This question tests Implement and manage Microsoft Entra identity and access — Read the scenario before looking for a memorised answer..
The correct answer is: Security keys (FIDO2) — The Security keys (FIDO2) authentication method policy must be enabled to allow users to register and manage FIDO2 security keys through the My Security Info portal. This policy controls the registration, key restrictions, and user targeting for FIDO2 authentication in Microsoft Entra ID, directly enabling the self-service management experience.
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
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