How to add a Google calendar to the BOS
To create the correct Google calendar format so that it can be added to a property, the following is necessary:
- Firstly, check the Calendar is Public
- From the Google Calendar app in a browser, click on the ellipsis next to the calendar name of the calendar you want to integrate with the BOS (on the left where all calendars are listed)
- Click on Settings and Sharing
- Click on Integrate Calendar
- Copy the link in the Public Address in iCal format box
- Paste the link in the BOS in the Portal Code or iCal URL field (described here)

A way of checking whether the calendar link works, before pasting it in the BOS, is to paste it in the address bar of a browser. It should download a file or prompt you to add it to your calendar app (Outlook, Apple Calendar, etc.).

A
video of the process can be seen
here.