Note: iCalendar is an IETF standard (RFC 5545) and not to be confused with Apple iCal.
Note: This article explains how to subscribe to and publish iCalendar feeds, not how to export and import iCalendar files, which would be of limited use.
Doodle to Outlook.com
With your browser, go to https://doodle.com/account#calendars and copy the link from the “Doodle calendar feed (ics)” section, e.g., http://doodle.com/ics/mydoodle/c441dlaaezup2c1e78tylnjulce5c5xs.ics.
In Outlook.com, choose Import, choose Subscribe (on the left), paste the link copied above, and click the Subscribe button.
Outlook.com to DoodleFor each Outlook.com calendar that you would like to view within Doodle, follow the instructions at http://windows.microsoft.com/en-us/windows/outlook/calendar-share for getting a link.
Copy the ICS link, e.g. webcals://cid-a9d28321fc4710fa.calendar.live.com/calendar/private/5b2d9cf5-92d5-4f5e-8c80-7745537796d7/60c178f9-8b04-4fc0-a4f8-f71f5bd010f4/calendar.ics
With your browser, go to https://doodle.com/account#calendars, click on "ICS feed".
Now paste the link copied above into the “Add a calendar feed by URL” field and click "Add".
Afterwards, remember to update your MeetMe settings at https://doodle.com/account#meetme if you have a MeetMe page.