Choose Default from the Permissions list.From the Home menu, choose Permissions.NOTE: Your Office 365 calendar will have the name that you entered in the Account Description field when you added your Office 365 account to Outlook. Under My Calendars, highlight your Office 365 calendar.Click OK to finish the process and exit the Calendar Properties screen.In the Permissions box, under Read, choose None. The Default properties should be highlighted.From the Home menu, choose Calendar Permissions.Click the Calendar tab in the lower left-hand corner of the client.You must use an Outlook client to change these settings, as you cannot edit global permissions in the Outlook Web App (OWA). If you wish to make your calendar information completely private and visible only to you, use the following instructions. By default, any USC faculty or staff member with an Office 365 account can view your Office 365 calendar and see if you are free or busy for a particular time period.