Microsoft KB Archive/839436

= User communication is interrupted in Live Communications Server 2003 when daylight-saving time begins =

Article ID: 839436

Article Last Modified on 1/23/2007

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APPLIES TO


 * Microsoft Office Live Communications Server 2003

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SYMPTOMS
When daylight-saving time begins, your Microsoft Office Live Communications Server 2003 users may experience both of the following symptoms:
 * Contact presence information is inconsistent.
 * Instant messages are not delivered to contacts who appear to be available.

Note These problems do not persist for more than nine hours, and they are typically resolved within two hours.



CAUSE
This problem occurs because Live Communications Server prematurely expires registration records and presence records when daylight-saving time begins.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

Download information
The following file is available for download from the Microsoft Download Center:

Download the KB839436-x86-enu.exe package now.

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites
No prerequisites are required to install this hotfix.

Restart requirement
You do not have to restart your computer after you apply this hotfix. However, the hotfix installation automatically restarts the Live Communications Server service.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

Hotfix installation information
You must install this hotfix on each one of the Live Communications Server Home Servers in your organization.

Note The installation of this hotfix automatically restarts the Live Communications Server service.

Important Because existing backups of your Live Communications Server MSDE database files will not have this hotfix installed, back up your database files after you install this hotfix. If you do not back up your database files, you may inadvertently overwrite the changes that this hotfix makes if you restore your Live Communications Server database from a backup.



WORKAROUND
To work around this problem, use one of the following methods.

Method 1: Ignore this problem
If you do not have critical communications that require Live Communications Server, ignore this problem. Live Communications Server automatically recovers within nine hours, and the problems are typically resolved within two hours.

Method 2: Sign out of Live Communications Server
Request that users sign out of and then sign back in to Live Communications Server after daylight-saving time begins.

Note You can force all users to sign out of Live Communications Server by restarting the Live Communications Server service.



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



MORE INFORMATION
This problem does not affect Live Communications Server when daylight-saving time ends. In this scenario, when the time is moved back by one hour, Live Communications Server does not expire registration records and presence records. The problem that is described in this article only occurs when daylight-saving time begins.

For additional information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:

816915 New naming schema for Microsoft Windows hotfix packages

For additional 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

Additional query words: LCS, rtc, IM, daylight time, daylight saving time

Keywords: kbbug kbfix kbqfe KB839436

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