Appointments that were created by using CDO on an Exchange 2000 Server computer may show an incorrect appointment time when CDO specifies the Mexico City time zone

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SYMPTOMS

Suppose that an appointment were created by using Collaboration Data Objects (CDO) version 1.21 on a Microsoft Exchange 2000 Server computer. When you view the appointment in your calendar, the appointment time may be incorrect by one hour. For example, an appointment that should start at 15:00 indicates that it starts at 16:00. This problem may occur when the following conditions are true:

CDO specifies the Mexico City time zone.
The appointment occurs during daylight-saving time.

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CAUSE

This problem occurs because CDO 1.21 does not correctly adjust for daylight-saving time for the Mexico City time zone.

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RESOLUTION

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.

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, submit a request to 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:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

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

Because of file dependencies, this hotfix has the following prerequisites:

You must be running Microsoft Exchange 2000 Server Service Pack 3 (SP3). For additional information about how to obtain the latest Exchange 2000 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
301378 (http://support.microsoft.com/kb/301378/ ) How to obtain the latest Exchange 2000 Server service pack
You must have the August 2004 Exchange 2000 Server post-Service Pack 3 update rollup installed. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
870540 (http://support.microsoft.com/kb/870540/ ) Availability of the August 2004 Exchange 2000 Server post-Service Pack 3 update rollup

Restart requirement

You do not have to restart your computer after you apply this hotfix. However, the Microsoft Exchange services are automatically stopped, and then restarted during the hotfix installation.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 tool in Control Panel.

   Date         Time   Version           Size      File name
   --------------------------------------------------------------
   06-Dec-2004  08:07  6.0.6617.28       720,896   Cdo.dll          
   06-Dec-2004  08:06  6.0.6617.28       745,472   Mapi32.dll

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