Recently, I was experiencing some odd behaviour on some of our Windows boxes. We were getting redirected to a proxy server but RSOP.MSC and group policy showed that we should have been good in the GUI.
The issue is IE Maintenance will store it’s settings in a INS file as opposed to the registry and for some reason IE Maintenance in GPEDIT.MSC doesn’t display the values. This document details it more:
The INS files created via GPO are placed in the following locations:
2003-“C:\Documents and Settings\trententtye\Local Settings\Application Data\Microsoft\Internet Explorer”