Upon saving it, all those registered participants receive a canceled webinar notification while the virtual meeting link is still valid. That includes the webinar registration page
You could set registration start and end time if you have _Teams Premium features.
To set registration start and end times:
- Go to Configuration under Registration.
- Select Limit registration start and end time.
- Designate the registration window by choosing times from the drop-down menus.
Attendees will receive an email informing them about changes to the date or time of the webinar; they won't get notified about any other changes.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.