When the OpenVPN Access Server is installed without a license key it allows only 2 simultaneous VPN connections. There is no time limit or functionality limit on this mode. The only difference between a licensed Access Server and an unlicensed one is the number of simultaneous OpenVPN tunnel connections the Access Server allows. To unlock more connections you can purchase a license key to unlock a certain number of connections. We suggest you read about the licensing models available for OpenVPN Access Server, and the Access Server pricing page to learn more.