Users may receive duplicate calendar items for the updated instance on mobile devices

Consider the following scenario:

• A Microsoft Exchange Server 2007 user uses Exchange ActiveSync to synchronize calendar items on a mobile device.
• The Direct Push feature is enabled for the synchronization.
• This user accepts a recurring meeting request, and the recurring meeting is synchronized to the mobile device.
• This user accepts an update to an instance of this recurring meeting on the mobile devices.

In this scenario, the user may obtain duplicate calendar items for the updated instance on the mobile device, and these duplicate calendar items cause conflicts and are confusing to the user.

Note By default, the Direct Push feature is enabled on a Windows Mobile 5.0 device that has the Messaging and Security Feature Pack (MSFP) installed or on a Windows Mobile 6.x device (Windows Mobile 6.x devices do not use the Messaging and Security Feature Pack).

Exchange ActiveSync offers Direct Push technology. Direct Push uses an encrypted HTTPS connection that is established and maintained between the device and the server to push new e-mail messages and other Exchange data to the device. During the response processing of a recurring meeting request, a wrong meeting ID is used that causes unwanted duplication.

To resolve this problem, install Update Rollup 8 for Exchange Server 2007 Service Pack 1.

For more information about Update Rollup 8 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic: For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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