Microsoft KB Archive/933858

= How the cumulative time zone update for Windows operating systems affects Antigen and Forefront =

Article ID: 933858

Article Last Modified on 3/8/2007

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APPLIES TO


 * Microsoft Forefront Client Security
 * Microsoft Forefront Security for Exchange Server
 * Microsoft Forefront Security for SharePoint
 * Microsoft Antigen for Exchange
 * Microsoft Antigen for SMTP Gateways
 * Microsoft Antigen Enterprise Manager 9.0
 * Sybari Antigen 8.0 for IM
 * Sybari Antigen 8.0 for Microsoft Exchange
 * Sybari Antigen 8.0 for Microsoft SharePoint Portal Server
 * Sybari Antigen 8.0 for SMTP Gateways
 * Sybari Antigen 7.5 for IM
 * Sybari Antigen 7.5 for Lotus Domino
 * Sybari Antigen 7.5 for Microsoft Exchange
 * Sybari Antigen 7.5 for Microsoft SharePoint Portal Server
 * Sybari Antigen 7.5 for SMTP Gateways

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INTRODUCTION
This article describes how the February 2007 cumulative time zone update for Microsoft Windows operating systems affects the Antigen and Forefront products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
Beginning in 2007, daylight saving time (DST) will be extended in the United States and in Canada. DST will start three weeks earlier than in previous years, on March 11, 2007. DST will end one week later than in previous years, on November 4, 2007.

This condition results in a new DST period that is four weeks longer than was previously observed. Unless certain updates are applied to your computer, the time zone settings for your computer's system clock could be incorrect during this four-week period. In particular, you must make sure that both Windows and your calendar programs are updated.

We have tested the products that are listed in the &quot;Applies to&quot; section together with the Microsoft Windows Server DST updates. We have verified that these products and the Windows Server DST updates are compatible.

For more information about DST updates, visit the following Microsoft Web site:

http://support.microsoft.com/gp/cp_dst

Keywords: kbhowto kbinfo kbexpertiseadvanced KB933858

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