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On a computer that is running Windows Vista, a 6.6.x.x version of the Cdosys.dll file is installed. On this computer, you apply the daylight saving time (DST) updates that are described in the following Microsoft Knowledge Base article:
933360 August 2007 cumulative time zone update for Microsoft Windows operating systems
After you apply these updates, applications that use Collaboration Data Objects (CDO) process the current time in the old version of the local time zone instead of in the updated version of the local time zone. Therefore, the applications may display the incorrect time.
For example, you may expect an e-mail message to have the following time stamp when you send it at 9:37 P.M. on March 11, 2007:
11 March 2007 21:37 (GMT-7)
However, the message displays the following time stamp:
11 March 2007 20:37 (GMT-7)
In Windows Vista, the Cdosys.dll module compares the current Windows time zone to a hard-coded time zone array. When you apply the DST updates, the Windows time zone changes. Therefore, the Cdosys.dll module cannot find a match for the current time zone in the hard-coded array. In this situation, the Cdosys.dll module uses a similar time zone in the hard-coded array instead of the local time zone.
Service pack information
To resolve this problem, obtain the latest service pack for Windows Vista. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
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.
No prerequisites are required.
You do not have to restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
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.