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I'd like to use this but it still doesn't work with my Yubikeys (blue U2F ones). I get an error message saying "this security key can't be used" with no indicat

I'd like to use this but it still doesn't work with my Yubikeys (blue U2F ones). I get an error message saying "this security key can't be used" with no indication of why. Same on multiple browsers with multiple keys.

warp 5y ago
Do you have PIN configured? As I understand it, I think Microsoft asks for a credential with "User Verification", which requires a pin code, password or biometric recognition. If the Yubikey is used a second factor (instead of the only factor as with passwordless), you can be more lax and ask for "User Presence", which only requires touching the key. ref: https://w3c.github.io/webauthn/#test-of-user-presence https://w3c.github.io/webauthn/#test-of-user-presence