Could you please explain how to integrate the Zoho Calendar application with Microsoft 365's Outlook calendar so that schedules from both calendars are displayed in the Outlook calendar?

I tried setting it up with reference to the following site:
https://www.zoho.com/calendar/help/sync-outlook-calendar.html
However, since Outlook Calendar is not available as an option for syncing with third-party tools, I could not establish the integration.


Additionally, if there is a method to input Zoho Calendar entries from the Zoho CRM tab or to input from the Outlook calendar to the Zoho Calendar, please let me know.