The Kerio VPN Client is provided as an accessory to Kerio Control. The Kerio VPN Client does not require any special license.
However, connected VPN clients are included in the total count of users (computers) during license checks in Kerio Control. This implies that the minimal number of licensed Kerio Control users needed for the particular server is the sum of hosts in LAN and number of VPN clients connected to the server at a moment.
Note: For detailed information on Kerio Control licensing policy, refer to the corresponding sections of the Kerio Control — Administrator's Guide document.