VPN connection on Cisco RV082

This is our setup: Cisco RV082 router (router, firewall and DHCP) Behind the firewall there is a MS Exhange server setup for "Outlook over HTTP/RPC" with a SSL certificate. We want our employees on the road to be able to connect to the internal network using Cisco´s QuickVPN client - but we have been unable to make succesfull connections. We are temporarily using PPTP VPN connections, but these are limited to only 5 tunnels and that is not sufficient. We suspect the problem with the QuickVPN connection having something to do with HTTPS traffic being port forwarded to the the Exchange server in order for the SSL certificate to function properly. So what we want your help with is fixing the QuickVPN connection issue while still maintaining other current services (like Exhange server, outlook over http/rpc etc) running as well.