I've got a licencse to create live events in Teams, but the option to make it public is grayed out. This is probably something to do with some settings. Does anyone know which setting I need to change in order to go public with an event?
yes, in the Teams Admin Center under Meeting / Live Events policies go to your policiy and check "Who can join scheduled live events" setting. More informations here: https://docs.microsoft.com/en-us/microsoftteams/teams-live-events/set-up-for-teams-live-events