If you go to SETTINGS  /  CALENDAR on Fiitfu, there is a Calendar Feed that you would need to turn on.

 

 

 

Now if you google "How to add a web-based calendar to outlook (add in whatever version you  have)"  then there should be some documentation on how to do that.

 

 

 

Each calendar is different, so best to google for your specific Outlook that you have.  The key is using the Fiitfu Calendar Feed.