Update a single calendar event
If you have the Google Calendar integration active, and you've got an existing confirmed participant that you want to update their calendar invite for any reason, you can do that by clicking their confirmed time from scheduling >> calendar.
This will allow you to update their single calendar event, for both participant and any collaborators without spamming the entire schedule of confirmed participants. Depending on which choice you make, they will either only get an update in their calendar or for increased compatibility with Outlook, select Emails + Calendar Update, which sends an additional email from the Google account you've associated with Ethnio.