If you haven’t already, you will need to first check out: How do I sync my tasks to my calendar?

Adding an ics or ical Calendar to Outlook 2007 is fairly straightforward.

• Open Outlook
  
• Switch to the Get It Done Web Page
  
• Click ‘Export’ – ‘Subscribe to Calendar’
  
• Click the Option to ‘Enable Calendar Syncing’
  
• Click the Calendar http link
  

The Calendar will open under ‘Other Calendars’ in Outlook.