Make sure you've created a WebCal link:
You can add your webcal link to Outlook by following these steps:
The go-to your Mac and add this link as a subscribed calendar.
- Open the Calendar app
- In the calendar app select
menu File > New Calendar Subscription
- Copy and put the RosterBuster Web URL in Subscribed to.
- Set the location field to iCloud to sync across all your devices (you need to be logged in with the same apple id across all devices).
- Make sure to update auto refresh and set it to Every 5 minutes