Creating shared presentations using PowerPoint

Our organization creates standardized PowerPoints for teaching classes.  We want to integrate Slido into these PowerPoints so anyone with them can run the polls and quizzes. We are part of a large organization that, I assume, has an enterprise version of Slido.  We use a Webex login to activate our accounts and download the PPT integration tool.  Is there a way to do this without inviting each participant individually?  We don't necessarily know who will be using the presentations at any given time.