The latest update to Webex Calling shifted everything to the webex app. When I try to configure calling in the app I am being asked for the Telephony Server Address or the Unified Communication Domain. It says to ask my administrator. I was slotted into the admin role with no training when the last person left. Am I able to find this information from the control hub? If so, where? If not. where can I as the admin find this info?