A separate channel is required for live support. In fact two channels are better. One for attendees and one for speakers. Dedicated support team answers queries and resolves issues as soon as possible and in near - real time. In some cases, they can even ask the participant to share their screen to troubleshoot issues. Frequently encountered problem list is maintained and updated live. This helps repeat problems to be handled faster. Many presenters as well as attendees are not familiar with Teams. Post short explainer and how to videos to assist them.