I've been mulling this problem over for a while and I finally have to accept I can't use IE Maintenance anymore for managing proxy settings. I've been reading up on how to make Server 2008 R2 work with GPP settings for IE 9 - 11. Everything I've read says I need to install the .admx files (link below) or install IE 10+ to get the IE Preferences to show up for 9, 10, and 11. But when I look at my .admx files in %systemroot%/PolicyDefinitions it has the same exact .admx file that I download from the Admin Templates. I can not see the policy preferences for IE 9, 10, or 11 and need these options so I can configure a Proxy server. How do I go about getting these preferences to become available in Server 2008 R2 SP 1?
#admx link
http://www.microsoft.com/en-us/download/details.aspx?id=36991
Note that I also tried the following to manually add support while testing but it didn't help me:
Open up the policy, and create an IE8 Preference: User Configuration --> Preferences --> Control Panel Settings --> Internet Settings --> New --> Internet Explorer 8 -> Set your proxy settings
Navigate to C:\Windows\SYSVOL\domain\Policies was an easier route, then sort by date for the recently created IE entry.
Navigate to User\Preferences\InternetSettings
Open up the "InternetSettings.xml file, and change the MAX value to something above 10.0.0.0 (I usually put 10.5.0.0). This way, the policy won't trip up later on if IE 11 comes out and doesn't support any of these policies, but at least you'll be safe
until 10.5.0, or until a hotfix is available. "
max="10.5.0.0"