Setting Up Facebook Commenting
NOTE: We recommend that your main Website manager/administrator be the one to register the Website on Facebook. This creates a permanent administrative relationship between that person and the Website for your organization (in the eyes of Facebook), so you want to plan this carefully.
Once you have the Facebook App ID, keep it handy and go back to your calendar settings screen in SiteOrganic (Calendar > Calendar Events > Choose Your Group > Click "Edit Calendar Settings").
Under the comments section, turn on Facebook and enter the App ID you got in the steps above. Click Save, and your calendar events will now show Facebook commenting panels.