Fortigate SSL VPN -Duo MFA Setup

Dear Team,

We are following all the steps as per DOC link 2FA for Fortinet FortiGate SSL VPN Clients with RADIUS Auto Push | Duo Security.

1,Configured AD
2.DUO MFA token assinged to user.
3.Configured Auth Proxy.
4.Configure Fortigate Firewall Radius Settings as per DUO DOC link.

Do we need to configure SSL VPN on Fortigate side still the user authentication fails even after following the details posted in Duo Web…

Please advice…