Microsoft retires SMS and voice MFA on 1 February 2027. What actually qualifies

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Security keys

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Security Key Series

The rollout key. FIDO2 and WebAuthn only, which is everything a Microsoft 365 or Google Workspace sign-in needs, at about half the price of a 5 Series. Start here unless something below says otherwise.

YubiKey 5 Series

Adds smart card, OATH codes, OpenPGP and Yubico OTP on top of FIDO2. Worth the difference for admins, break-glass accounts and anyone whose password manager or VPN needs more than WebAuthn.

YubiKey Bio Series

A fingerprint instead of a PIN. FIDO2 and WebAuthn only, like the Security Key Series, so you are paying for the sensor rather than extra protocols. Built for shared desks where typing a PIN in the open is the problem.

YubiKey 5 FIPS 140-2 Series

The 5 Series in a NIST-validated build, for control sets that name FIPS. Check whether yours requires 140-2 or 140-3 before ordering: these are 140-2, and registering a key voids change-of-mind returns.