Cisco has retired the Webex Meetings tool and now uses the tool simply named: Webex. This tool has the same chat functionality as Jabber (it actually is Jabber's successor, but we do not support phone calls in Webex yet).
The primary thing you need to know about the new Webex tool at this time is how to start a meeting in your personal room.
From Webex, click the plus sign at the top and click Start a meeting.