To allow access to your Outlook Calendar, complete the following:

1.  Open Outlook, right mouse click on Calendar and select Properties.  This opens a dialog window.
2.  Click on the Permissions tab.
3.  Click the Add button to open the Active Directory and select the recipient you want to provide access.
4.  Click the OK button.
5.  Determine the access level you want the person to have either by click the arrow by Permission
     Level or checking the options under the Read and Delete Items area.  Most people select
     Reviewer but the choice is yours.
6.  Click OK and now the individual should be able to open your calendar.

Sharing your calendar is different then using the Delegates option which allows an individual to create and respond to meeting requests on your behalf.