MS Live Events Public AND External App > not possible/supported. Why and are there solutions?

Lars Roth To add to my previous post and after my test, I believe there is a solution to solve the situation where external participants cannot join a teams live event when the option "external app" is selected. 

Let's say I work with an AV vendor and they will use OBS or Wirecast PRO encoder software. The vendor will send the regular teams invite (not teams live) to all the presenters this way the vendor is able to manage the presenter's teams video integration with OBS or Wirecast PRO (this works well because Teams live attendees can only listen).  

From my side, I will setup the Teams live as an Org > on the same page down below I will select an external application >  and create. I will be the producer and I will invite someone else who will manage the Q&A (this part need to see how it works in case the moderator needs to be live as well). After setting up the Teams Live event now I need to get the rtmp url so that I can share with the vendor who will enter this url on OBS or Wirecast Pro. To get this url, I can open the Teams calendar > open the invite and join the meeting (without starting it live) then, I will be able to see the the urls as per picture below and copy the URL's. Another place to get it is to go to Microsoft stream > content > videos > setup code and get it from there as well. 

My intention will be to learn the OBS/Wirecast PRO software so that I can better support the company I work for and save cost as these large events sometimes are monthly. Good luck with your events!