The FortiClient SSO Mobility Agent is a feature of FortiClient Endpoint Security. The agent automatically provides user name and IP address information to the FortiAuthenticator unit for transparent authentication. IP address changes, such as those due to Wi-Fi roaming, are automatically sent to the FortiAuthenticator. When the user logs off or otherwise disconnects from the network, the FortiAuthenticator unit is aware of this and de-authenticates the user.