In June of 2024, we introduced an improved email notification experience between Google Calendar and third-party calendar services, like Outlook, via beta. Beginning today, this update is now generally available. 

Specifically, this update addresses feedback we’ve heard from our customers regarding the syncing experience from Google Calendar to third-party calendars. The syncing experience is now more reliable and gives recipients an effective way to filter out Calendar emails that may have cluttered their inbox.  

• Google Calendar will send additional emails to improve event sync accuracy when users make updates to recurring events. 
• Email notifications purely intended to sync information will display a banner in the email body with instructions on how to create inbox filters to hide similar emails, which can help to minimize clutter in recipients’ inbox.
• At scale, Outlook system administrators can use Microsoft’s Powershell to implement an email filter rule for these messages for all users.