Send an Internet (iCal) meeting request

To send Internet (iCal) meeting requests, you must turn on the option to do so by following the procedure below. Then send meeting requests as usual.

1. In Calendar, on the Tools menu, click Options, and then click Calendar Options.
2. Under Advanced options, select the When sending meeting requests over the Internet, use iCalendar format check box. To turn off iCal, clear the check box.