Article ID: 873164
Consider this scenario. You try to use Veritas Backup Exec to back up a Microsoft Windows XP Service Pack 2-based computer from a remote Microsoft Windows Server 2003-based computer that has the Active Directory directory service installed. In this scenario, you receive an error message that is similar to the following, where ServerName is the name of the Windows XP Service Pack 2-based computer:
Logon account 'System Logon Account' failed to access '<ServerName>'. The item was not found
This issue occurs if the Windows XP Internet Connection Firewall (ICF) is enabled on the Windows XP Service Pack 2-based computer.
To resolve this issue, use one of the following methods.
Method 1: Configure an exception in Group Policy
Method 2: Configure an exception and open the port in the Windows Firewall Control Panel
For additional information about how to configure an exception in the Windows Firewall Control Panel, click the following article number to view the article in the Microsoft Knowledge Base:
842242The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
(http://support.microsoft.com/kb/842242/ )How to troubleshoot applications with Windows Firewall