I am configuring my users to access VPN with 2-factor authentication: password + SSL certificate.
I have no problems with IE on Windows 7 but on Windows 10 only Firefox is working properly.
Edge and IE11 are not prompting for certificate and after submitting login credentials I am ending up on message: "You do not have a client certificate installed. Click here to select an alternative authentication scheme."
I already tried on two computers: desktop with Windows 7 upgraded to Windows 10 and laptop with factory pre-installed Windows 10 with identical results. Both computers are up to date with Windows patches. I am able to log-in with Firefox but IE and Edge somehow do not submit their client certificate.
My Barracuda SSL VPN, model 380 is also up to date with firmware version 126.96.36.199
In NAC I am not blocking any OS or browser version: everything is set to "Allow".