Uros Bregar 0 Newbie Poster

I configured RRAS server on my windows 2003 server installation. I use it to allow users to connect to my server using VPN. Does anybody know how can I set it up that so it will require that users have digital certificates installed on the client computer? The server is a domain controler and it has CA service installed. Any advice will be appritiated

Thanks in advance
Uros