Microsoft KB Archive/934274

= Applications that use CDO process the current time in the incorrect time zone after you apply DST updates on a computer that is running Windows Vista =

Article ID: 934274

Article Last Modified on 8/16/2007

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APPLIES TO


 * Windows Vista Ultimate
 * Windows Vista Home Premium
 * Windows Vista Home Basic
 * Windows Vista Enterprise
 * Windows Vista Business
 * Windows Vista Business 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition

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SYMPTOMS
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)



CAUSE
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.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only 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 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

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

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
No prerequisites are required.

Restart requirement
You do not have to restart the computer after you apply this 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 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.

Windows Vista, 64-bit versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbbug kbfix kbqfe kbpubtypekc kbexpertiseinter kbhotfixserver kbwinvistapostrtmfix KB934274

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