System Center Essentials 2007: Managed computers have “Unknown” update status in System Center Essentials 2007

SUPPORT SOLUTION:
In Microsoft System Center Essentials 2007, the status reports for some managed computers display the following symptoms: The computer’s Update Status is displayed as Unknown.
When you view the computer’s properties, most of the hardware inventory attributes, such as Operating System, Hard Disk, Manufacturer, and Memory are listed as Unknown. Or, the attribute is blank. The installed software list for the computer shows no information.
Event Viewer displays the following Error event:  Event ID: 13022: Many managed computers are not reporting their inventory. # have been detected so far.
.This issue occurs when one of the following conditions is true:The managed computer’s Updates agent is configured incorrectly. The managed computer’s Updates agent cannot send status information back to the System Center Essentials 2007 server..To resolve this issue, use one or more of the following methods..Method 1: Make sure that the Group Policy settings are in effect
2, ‘resolution’);
Make sure that the SCE Managed Computers Group Policy setting and the System Center Essentials All Computers Group Policy setting are in effect for System Center Essentials 2007.For more information about how to manage Group Policy for System Center Essentials 2007, visit the following TechNet websites:System Center Essentials 2007 Feature Configuration Wizard: Group Policy setup page
(http://technet.microsoft.com/en-us/library/bb437346.aspx)
.Method 2: Determine whether there is a duplicate SusClientID in the Windows Server Update Services (WSUS) console
2, ‘resolution’);

For more information about how to determine whether there is a duplicate SusClientID in the Windows Server Update Services (WSUS) console, click the following article number to view the article in the Microsoft Knowledge Base:

903262 

(http://support.microsoft.com/kb/903262/
)

A Windows 2000-based, Windows Server 2003-based, or Windows XP-based computer that was set up by using a Windows 2000, Windows Server 2003, or Windows XP image does not appear in the WSUS console

.Method 3: Make sure that TCP port 8531 is open
2, ‘resolution’);
Make sure that the port, TCP 8530 (UpdateServices), is open in the firewalls of the server and of the managed computers. For more information about how to configure these firewalls, visit the following TechNet website:How to change Windows Firewall exceptions for System Center Essentials
(http://technet.microsoft.com/en-us/library/bb437377.aspx)
.

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