Microsoft Windows 2003 Server Service Pack 2 changed the way SNMP is handled on a Windows Server 2003 Print Server. Please see the following Microsoft Knowledge base Article for further information.

http://support.microsoft.com/kb/946198


Here are 2 additional web site links from the internet that provide some additional notes.
http://blog.tiensivu.com/aaron/archives/1344-Upgrade-from-Windows-2003-SP1-to-Windows-2003-SP2-printers-get-marked-as-offline-workaroundfix.html

 

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