SC-300 Certification Practice Question #97

Question

You have a Microsoft 365 tenant.
All users have mobile phones and laptops.
The users frequently work from remote locations that do not have Wi-Fi access or mobile phone connectivity. While working from the remote locations, the users connect their laptop to a wired network that has internet access.
You plan to implement multi-factor authentication (MFA).
Which MFA authentication method can the users use from the remote location?

Accepted Answer

The users have laptops with wired internet but no Wi-Fi or mobile-phone connectivity. The Microsoft Authenticator app's OATH/TOTP verification code is generated locally from a shared seed every 30 seconds and works entirely offline (no data, no cellular). MS Learn explicitly states the verification-code option enables MFA in isolated environments where SMS and Voice calls won't work. Security questions are not an MFA method at all, and both voice and SMS depend on telephony connectivity the users don't have. The official Suggested Answer, the unanimous community vote (A, 18 votes), and multiple high-vote comments all converge on A. A small amount of dissent stems from misreading the scenario (assuming users have no internet), but the wired connection plus offline-capable codes resolve it — hence 92% rather than higher.

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