- 1). Open Outlook and click on the calendar icon in the lower left hand corner of the window.
- 2). Open the calendar folder containing the appointment for which you'd like to create a vCalendar file. Click on the appointment.
- 3). Click on the "File" menu, located in the top left of the window, and then select "Save As."
- 4). Select "vCalendar Format (*.vcs)" from the drop down menu labeled "Save as file type." Then select the folder to which you want to save the vCalendar file. Click Save, and you are finished.
Source...