Google Calendar Notifications
October 16, 2018
Google is changing how Calendar communicates event updates to meeting attendees who don’t use Google Calendar. Non- Google Calendar users will now always be sent an email when an event is created, updated or deleted in Google Calendar. Some calendar systems do not update these details without an email, meaning event information is sometimes outdated. The current option is to send the updates to all guests or not to send the updates.
After this update when you create or change an event, Google Calendar asks if you want to send an update email to the Google guests. This choice will only apply to Google Calendar attendees. Regardless of what notification choice you make, Google Calendar attendees’ events will be kept up to date, and non-Google calendar users will get an email update with the changes.