If you want to send the changes back to Google Calendar, you need to export your Outlook Calendar.
Google officially announced "Google Sync End of Life", including the Google Calendar Sync, last year.
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Group calendars are commonly needed among organizations that rely on Microsoft Outlook for managing calendars.
If you use multiple accounts on your Mac like i Cloud, Gmail, and Yahoo, make sure that i Cloud is your default Calendar account: If you get a calendar request that you think might be spam or junk, let us know.
Sign in to i with your Apple ID and go to the Calendar app.
Link Point Connect offers users the flexibility to control when and how their calendar items are synchronized between Microsoft Outlook and Salesforce with a Manual Sync feature.
In this section, you will learn how to use Manual Sync to synchronize calendar items both to and from Outlook and Salesforce.