How to Remove Someone From Viewing My Calendar in Outlook 2007
If your computer is on a Windows Server network and the workstations on your network use Outlook 2007 for email, you have the ability to give others in the workplace permission to view your calendar. While this feature generally increases workplace productivity, it is possible that you might use this feature and accidentally give access to someone who should not have the ability to view your appointments. Access the sharing permissions for your Outlook calendar in Outlook 2007 to remove a user that has previously been granted permission to view your calendar.
Launch Outlook 2007, and click the "Calendar" button in the lower-left corner of the window. Under "My Calendars," right-click the name of the calendar that you want to remove a user from and then click "Change Sharing Permissions." A new window appears.
Click the "Permissions" tab if it is not on top already. A list of the people who have permission to view your calendar is displayed.
Click the name of the person that you no longer wish to have the ability to view your Outlook 2007 calendar, and then click the "Remove" button. The person you have removed can no longer view your calendar.
Click "OK" to resume using Outlook 2007.