The VPN Client uses parameters that must be uniquely configured for each remote user of the private network. Together these parameters make up a user profile, which is contained in a profile configuration file (.pcf file).
To avoid distribute preconfigured profiles, remove the configuration files (.pcf files) from the Profiles folder in the vpnclient installer directory.
Any file with a .pcf extension found in this folder is placed in the Profiles directory when the VPN Client is installed.