Use a certTool to install trusted certificates and an identity certificate before configuring edge Branch Session Manager. Configure Avaya WebSocket Tunnel (AWTUN) so that the WebSocket connection is through Application Delivery Controller (ADC). If your ADC utilizes certificates issued by Entrust, AWTUN trusts the certificates. If your ADC utilizes certificates issued by any other Certificate Authority (CA), load the CA into the AWTUN trust store. Use certTool to import the required CA files to establish communication with ADC.