How do I unmanage an element?
From the Administration Console, select the element and right-click Unmanage. To unmanage a port or interface, select the element from the device’s ComposedOf topology list, and right-click Unmanage. Be sure to select Inventory > Reconfigure and Inventory > Save Inventory when you are done. You can also unmanage all elements in a group (including a group of ports or interfaces) if you have installed the latest DFM IDU from http://www.cisco.com/pcgi-bin/tablebuild.pl/cw2000-dfm.