Can I use RADIUS on Windows 2012R2 for Juniper SSG140?

Hello;

Instead of using LDAP, can I use RADIUS setting on Juniper SSG140 to authenticate my SSLVPN user to Active Directory which is Windows 2012R2.  Can anyone direct me to the right place to find the answer?

1. I want to setup a SSLVPN for remote user who can access to my local resource via Windows AD authentication.

thanks!