CDO uses incorrect 2003 daylight saving time dates for the Mexico City time zone

Microsoft Collaboration Data Objects (CDO) for Exchange 2000 uses incorrect start and end dates for 2003 daylight saving time in the (UTC -06:00) Mexico City (and Tegucigalpa) time zone. CDO incorrectly sets the following 2003 start and end dates for daylight saving time:

• Daylight saving time begins at 02:00 on the first Sunday of May.
• Daylight saving time ends at 02:00 on the last Sunday of September.

The correct 2003 start and end dates for daylight saving time in the (UTC -06:00) Mexico City (and Tegucigalpa) time zone are:

• Daylight saving time begins at 02:00 on the first Sunday of April.
• Daylight saving time ends at 02:00 on the last Sunday of October.

This issue occurs because CDO uses code that incorrectly sets the start date to the first Sunday in May and the end date to the last Sunday in September. This issue occurs in builds 6452 to 6457 of CDO for Exchange 2000.

Cumulative Rollup Information

To resolve this problem, obtain the September 2003 Exchange 2000 Server Post-Service Pack 3 (SP3) Rollup. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

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: 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.
Component: CDO

The English version of this hotfix has the file attributes (or later) 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.
Note Because of file dependencies, this update requires Microsoft Exchange 2000 Server Service Pack 3 (SP3). For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

To determine the build number of your installation of Exchange 2000:

1. Click Start, point to Programs, point to Microsoft Exchange, and then click System Manager.
2. In the console tree, expand Administrative Groups, expand the appropriate administrative group, and then expand Servers.
3. Right-click ServerName, click Properties, and then click the General tab.
   
   You can view the version, build number, and service pack number of your installation of Exchange 2000 Server under ServerName.

For additional information about previous daylight saving time implementations for the (UTC -06:00) Mexico City time zone, click the following article numbers to view the articles in the Microsoft Knowledge Base: