If you have numerous Cisco VPN Clients, it is very hard to remember all the VPN Client usernames and passwords. In order to store the passwords in the VPN Client machine, configure the ASA/PIX and the VPN Client as this section describes.
ASA/PIX
Use the group-policy attributes command in global configuration mode:
group-policy VPNusers attributes
password-storage enable
Cisco VPN Client
Edit the .pcf file and modify these parameters:
SaveUserPassword=1
UserPassword=