Within your broadcast studio, you can check and amend your Stream Settings. First, click the "Stream Settings" button located top right in the studio.
The first option you will see is: Onlive Studio or Own RTMP Broadcast
(1) Onlive Studio is used if you would like to use our interface/layout tools, uploading of videos, and management of speakers.
(2) Own RTMP Broadcast, if you have a professional third-party studio such as Vmix, OBS, or similar. In that case you copy the RTMP address and key and once you see the stream you press "Go Live"
You can find out more about how to retrieve the RTMP key from secondary platforms here.