Consider the following scenario:
            - User A has a Calendar folder in a Microsoft Exchange Server 2010 environment.
 - User B is assigned the Review permission to the Calendar folder for user A.
 - User B sends a meeting request to user A.
 - The meeting request conflicts with an existing private meeting or appointment for user A.
 - User B then opens the Calendar by using an Outlook Web App (OWA) Web Part. For example, user B opens the Calendar by using the following URL: https://ServerName/owa/UserA_MailAddress/?cmd=contents&module=calendar