Start in your ARI account
Navigate to settings
Select 'Calendar Settings'
Once you are in your calendar settings toggle on and then copy the calendar/s you want to sync to Outlook.
Next you will want to open your Outlook calendar
Select 'Add calendar' on the left side where it lists all your calendars
This may look slightly different whether you are using the web or desktop
Next you will want select 'Subscription from web'
Paste the URL that you copied from ARI and click Import
You can do this for both your ARI Team and your ARI Personal Calendars
Your events that you log in your ARI calendar will now populate on your Outlook calendar!