Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
When you schedule a scan engine update in Microsoft Forefront Server Security for SharePoint or in Microsoft Forefront Server Security for Exchange, the scan engines are not updated . Additionally, the following error is logged in the Drive:\Program Files\Microsoft Forefront Security\SharePoint\ProgramLog.txt file:
ERROR: Unable to load manifest from: http://forefrontdl.microsoft.com/server/scanengineupdate/x86/Microsoft/Package/manifest.cab : (0x00002ee7) The server name or address could not be resolved. WinHttpClient failed while sending a request.
Additionally, the following error is logged in the Application log:
Microsoft Forefront Server Security encountered an error while performing a scan engine update.
Note This problem may also occur when you try to manually update a scan engine.
If you are using Microsoft Forefront Server Security Management Console (FSSMC), you receive the following error in the console:
Download of <EngineName> failed.
When you move your pointer over the "Information" icon, you receive the following additional information:
Failed to download manifest information for engine <EngineName> from URL: 'http://<EngineDownloadLocation>//<EngineName>//Package/manifest.cab'
This problem occurs if you are using any of the following scan engines:
These engines are being discontinued on December 1, 2009. You will not receive any additional updates for these discontinued scan engines after this date.
For more information, visit the following Microsoft Web site:
If you are not using any of the discontinued scan engines, this problem occurs because the Forefront Server Security server cannot reach the Microsoft engine download site.
To resolve this problem, follow these steps.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
Confirm that you can reach the Microsoft engine download site. To do this, verify the following items:
The proxy and firewall settings on the proxy or firewall and in Forefront
Other network issues
If you cannot reach the download site, determine the version of the scan engine. To do this, follow these steps:
Download the latest Manifest.cab file from a URL that resembles the following URL: