Follow these steps to import an ICS file from your event homepage into your Outlook calendar.
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In Outlook, select File > Open & Export > Import/Export. 
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In Import and Export Wizard box, select Import an iCalendar (.ics) or vCalendar file (.vcs),and then Next. 
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Select the calendar file from your PC and select OK. 
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Select Import. The event is automatically imported into your existing calendar. 
