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

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.

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

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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 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 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 
				

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

For additional information about Microsoft software updates, click the following article number to view the article in the Microsoft Knowledge Base: