AADSTS75011 - OpenVPN Access Server Entra SAML Fails with FIDO2 / Passkeys

Problem OpenVPN Access Server is set up with SAML and uses Microsoft Entra (could apply to other IDPs though) for authentication. When attempting to move to passwordless authentication for Microsoft Entra, you encounter the error "AADSTS75011: Authentication method 'MultiFactor, Fido' by which the user authenticated with the service doesn't match requested authentication method 'Password,…