Is there a way to use the Windows Native VPN Clients in conjunction with ASA 5520's running IOS 8.0? XP and Vista. I would rather use them because I have several custom applcations that are triggering the windows VPN Client. As a workaround I have just enabled passthrough and have the vpn running on another server but I would prefer to have it on the ASA's.
Sounds like you want to use L2TP over IPSEC, below is a link on how to configure this on the ASA:-