In a Microsoft Exchange Server 2007 environment, consider the following scenario:
User A sends a recurring meeting request to User B.
User A changes the time for one occurrence of the recurring meeting request, and then User A sends the update to User B.
User A changes the time for the exception instance again, and then User A sends the new update to User B.
• User B is running a Microsoft Office Outlook client in cached mode.
• User B views the second update in Outlook.
In this scenario, you expect the When field to show the new time in highlighted text and the original time in strikethrough text. However, the When field shows the new time in non-highlighted text. When User B changes the focus of the mouse and then moves the pointer back over this update, the text in the When field is now displayed in the expected manner.
Note If User B uses an Office Outlook client that is running in online mode, the When field is not highlighted when User B moves the pointer back to the exception instance.
When the Exchange Server 2007 server processes the exception update, the server does not change the sequence number of the exception instance. If Office Outlook re-processes the exception instance for a later update, Office Outlook cannot determine whether the instance is an update for the exception instance. Therefore, the highlighting is removed from the exception instance.
To fix this problem, apply the following update rollup:
972076 Description of Update Rollup 2 for Microsoft Exchange Server 2007 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.