To make sure all attendees see the most up-to-date event information, we’re changing how Google Calendar communicates event updates to meeting attendees who don’t use Google Calendar. Specifically, users who don’t use Calendar will now always be sent an email when an event is created, updated or deleted in Google Calendar. Previously, some calendar systems would not update these details without an email, meaning event information was sometimes outdated. This feature has been widely requested by customers to help keep event details up to date for all users.

“Don’t send” option for Google Calendar users

When you create or change an event, Google Calendar asks if you want to notify attendees. 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.


We’ll also be making some changes to the Calendar API to support this feature. You can learn more about the new sendUpdates parameter in the Calendar API reference.

Launch Details
Release track:
Launching to Rapid Release, with Scheduled Release coming in two weeks

Editions:
Available to all G Suite editions

Rollout pace:
Full rollout (1–3 days for feature visibility)

Impact:
All end users

Action:
Change management suggested/FYI

More Information
Help Center: Sending event invitations and updates
Google Developers: Calendar API

Launch release calendar
Launch detail categories
Get these product update alerts by email
Subscribe to the RSS feed of these updates

Source: G Suite Updates Blog