Additional meeting and call-related features and issues within Microsoft Teams for business
Hi, Michael,
My name is Didi. I'm happy to help you today.
When you scheduled the webinar, may I know if you copied the registration link and sent it to your invitees?
For more information on how to schedule a webinar, you may see the link below.
https://support.microsoft.com/en-us/office/sche...
Best regards,