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Private appointment is visible to a delegate in an Exchange Server 2010 environment

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: 
In this scenario, the subject and location of the private meeting or appointment in the calendar are unexpectedly visible to user B.
To resolve this issue, install the following update rollup:
2746164 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 2

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information about the Add-MailboxFolderPermission cmdlet, go to the following Microsoft website:For more information about Outlook Web App Web Parts, go to the following Microsoft website:

Article ID: 2783649 - Last Review: 02/12/2013 16:52:00 - Revision: 2.0

Microsoft Exchange Server 2010 Service Pack 2

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