Is there a way to insert a company logo and template indicating "Your Live Event will begin in a moment." and "Thank you for attending today's Live Event." at the end?
There is not at this time. Some people have asked for customization of the lobby which is different I think than what you are asking. Others would like the ability to have cycling slides going in the meeting during the join time. Both are great features - I would add your ask to user voice https://aka.ms/teamsfeedback - thank you for bringing this up!
