How to view your iCloud Calendar in Outlook for Windows

1. Confirm that iCloud for Windows is installed.
2. Open iCloud
3. Check the box next to "Mail, Contacts, Calendars, and Tasks with Outlook"
4. Click "Apply"
5. If Outlook is open, it may prompt you to close Outlook. In that case, click OK.

You should now be able to view all of your iCloud calendars though Outlook.