In the left column, click My calendars to expand it, click the arrow button next to the calendar that you want to import into Outlook, and then click Calendar Settings. Under Private Address, click ICAL. read more
In Outlook, open the Calendar, and select the calendar you want to export. Click File > Save Calendar. Use the default name or type a name for the iCalendar file in the File name box. read more
In the left column, under My calendars, click the drop-down arrow next to the calendar that you want to add in Outlook. Then, click on Calendar settings. Scroll all the way down to Private Address and click on the iCal button. read more