Consider the following scenario. A recurring meeting request is sent from a Microsoft Exchange Server 2003 user to an external recipient, such as a Lotus Notes user in a different organization. Then, the meeting is packaged in an iCalendar attachment. If an update to that meeting is sent from Exchange Server, Exchange Server sends a new iCalendar attachment that has the RRULE property updated. However, Exchange Server does not increase the SEQUENCE property as required by Request for Comment (RFC) 2445, "iCalendar." In this scenario, the update does not occur on the receiver side.

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Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

You must have Microsoft Exchange Server 2003 SP2 installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this software update. However, the Exchange Information Store, Microsoft Search, the IIS Admin Service, and all other dependent services will be restarted to apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other software updates.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

File name	File version	File size	Date	Time
Davex.dll	6.5.7653.30	1,132,032	05-Mar-2008	21:27
Exoledb.dll	6.5.7653.30	2,623,488	05-Mar-2008	05:28
Exosal.dll	6.5.7653.30	70,144	05-Mar-2008	21:18
Mdbmsg.dll	6.5.7653.30	3,381,248	05-Mar-2008	18:00
Store.exe	6.5.7653.30	5,266,432	05-Mar-2008	21:19

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

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For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:

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For more information about the iCalendar attachments and about the RRULE and SEQUENCE properties, visit the following Microsoft Web site: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

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