I am working on a SharePoint site for a client who has an interesting log in request that I was hoping I could get some help with. My client would like initial authentication to be attempted using Active Directory and if that fails rather then prompt for username and password have the user forwarded to an external site for authentication using a smart card. I currently have Active Directory authentication up and running but have no idea how to accomplish the ladder. I'm pretty new to SharePoint development and administration so your response will have to be fairly verbose. Please Help!
Thank you in advance!