In the Interface Classification (IC) department, we made it even easier to find which interfaces in your account are not being classified based on your existing rules. In the Classified Devices pane on the right side of the Interface Classification screen (Admin » Interface Classification) you will now see a View X Unclassified Interfaces button like the one highlighted on the right. Clicking this will bring up the Unclassified Interfaces dialog like the one below that shows a list of all the interfaces in your account, by device, that have not matched one of your IC rules.