CAUSE
This problem occurs when all the following conditions are true:
- Users in your organization use e-mail clients such as Microsoft Outlook Web Access. Alternatively, users use other devices or programs that use CDO to view and to manage their calendars.
- Your organization is configured to use the Coordinated Universal Time (UTC) time zone. (Coordinated Universal Time is also known as Greenwich Mean Time).
- The month of October has five Sundays.
In the UTC time zone, daylight saving time starts on the last Sunday in October. However, a code defect in CDO causes the daylight saving time adjustment to occur on the fourth Sunday in October. This code defect causes an incorrect daylight saving time adjustment to occur in years that have five Sundays in October. For example, for client programs that use CDO to access meeting information, the daylight saving time adjustment occurs on October 22, 2006 instead of October 29, 2006 as expected.
Note
This problem will occur next in the year 2010.
RESOLUTION
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 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
You must install Microsoft Exchange Server 2003 Service Pack 2 (SP2) before you apply the hotfix.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
836993
How to obtain the latest service packs for Exchange Server 2003
Restart requirement
You do not have to restart the computer after you apply the hotfix.
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) 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.
|
| Cdo.dll | 6.5.7650.8 | 715,776 | 02-Dec-2005 | 18:51 | x86 |
| Excdo.dll | 6.5.7650.8 | 3,629,056 | 03-Dec-2005 | 10:18 | x86 |