You create a recurring meeting request together with marking the recurring meeting request as Private in a Microsoft Exchange Server 2007 environment.
You send the recurring meeting request to an attendee.
You edit an occurrence of the recurring meeting request in Outlook Web Access (OWA), and then send the updated occurrence to the attendee.
In this scenario, the Privatesensitivity status of the updated occurrence is lost in both your calendar and in the attendee’s calendar.
This issue occurs because OWA does not inherit the Private sensitivity value from the master value when it updates an exception. Therefore, the updated occurrence is set as Normal which is the default sensitivity value.
To resolve this problem, install the following update rollup:
2407025 Description of Update Rollup 2 for Exchange Server 2007 Service Pack 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.