After you have enabled Preregistration for a Live Event, you may want to share its link to promote it. You can even encourage your users to add it to their calendar.
Navigate to Content, go to Live Events, choose which live event you want to share, then click on the three horizontal dots (⋯). Select the Copy link option, and a message at the top will display informing you the link has been copied. Now that you have the link, you are ready to share your live event with everyone.