You determine the Zones ID for your MediaBridge when you configure your CCHD account. If you haven’t set those up already, please do so now. Once those configurations are in place, go back to the relay server admin screens and enter the info per your CCHD settings.
From the CommandCenterHD Dashboard hover over the wrench in the top orange bar and select Configuration in the drop down. Create your new MediaBridge Zone by selecting Add Zone.