I’ve added a YubiKey hardware token to my User account and used it successfully for logging in as that user to a Remote Desktop Session.
I would also like to use the same token for logging in to the Duo Admin Panel. When I edit the Administrator account, however, there is nowhere to select a hardware token under Secondary Authentication. Only Duo Push is listed.
If I go to Hardware Tokens and click Attach User, the Administrator account is not listed.
Is this a limitation of using Duo Free, or is there some other reason I can’t attach the existing YubiKey to the Administrator account?