A method for installing authentication credentials on a network device. An intermediary computing device (e.g., client computer) downloads an application for installing the authentication credentials from a secure website. The application on the intermediary computing device requests authentication credentials from a Network Access Control (NAC) credential service. The application passes the authentication credentials received from the NAC credential service through the intermediary computing device to an endpoint (e.g., video conferencing device). The application installs the authentication credentials on the endpoint.