Shared calendar appears in the Outlook web app but not in the desktop app

After setting up Office 365 on a new computer and not able to see the shared calendar In Outlook client. The Microsoft 365 feature must be selected in order or the calendar to appear

In Outlook desktop, go to File > Account Settings > Account Settings to open the Account Settings dialog. Double click on the account and click More Settings. On the advanced tab, is the option selected to use the new calendar improvements. Select it and then close the dialog and restart Outlook. The calendar should sync down with your Outlook.com account.