Windows 8 and IE10 not accepting Proxy Settings via Group Policy

Question

We have recently introduced a couple of Windows 8 computers in our network, and we are having issues applying the Internet Explorer Proxy Server settings.
We use a Microsoft TMG 2010 server as our proxy server for accessing the internet.
 We have been using a GPO with the following settings to automatically configure our Windows 7 computers running IE9 with the appropriate Proxy settings:
User Configuration\Policies\Windows Settings\Internet Explorer Maintenance\Connection/Proxy Settings
“Enable Proxy Settings” : Checked
“Address of proxy” : server.domain.local
“Port” : 8080
“Use the same proxy server for all addresses” : Checked
“Exceptions” : Here we have a list of several internal or partner sites that should not be proxied.
This GPO has worked beautifully for our Windows XP and Windows 7 users with IE 7, 8 and 9.
 Now with Windows 8 and IE10, this no longer works. 
I’ve therefore added a Windows Server 2012 Domain Controller to the network, and using GPMC on that new DC, I created a new GPO with the following settings:
User Configuration\Preferences\Control Panel Settings\Internet Settings\Internet Explorer 10
Now, seeing as these are preferences, it’s a little different.  But, I’ve “checked off” the option “Use a proxy server for your LAN” as well as “Bypass proxy server for local addresses”. 
Then I click on “Advanced” and setup all my proxy settings the way I would like them, including the proxy server name, port and exceptions list.
When this new group policy gets applied to my Windows 8 PC, the only setting that gets applied is the “Use a proxy server for your LAN”. 
It does not configure the name or port of the proxy server nor does it configure the exceptions list. 
If I go back to the GPMC, and edit the new GPO, the settings are all there. 
However, if I just view the settings from the main GPMC screen (without opening the GPO itself), 
I don’t see all of those settings (again, only the one “Use a proxy server…”)
What am I missing???

Answer 1

Hi All, - (Revised Answer by myself)<o:p></o:p>
I banged my head against the keyboard on this one for some time trying to get this group policy to apply.  I
did every thing that was suggested, learning about the F6 and F7 keys to Green underline and Red underline the options required and not required.  I even gave in and used the registry settings and it still did not work.  It turned out that I had
2 issues.  The first one is obvious and the second not so obvious, this is how it is setup:
I have a 2012 R2 Standard DC with Windows 8.1 clients/workstations and IE 11.  As you are aware you must make
sure that the following are underlined in green:
Automatically detect settings - (but not ticked)<o:p></o:p>
Use proxy server for your LAN<o:p></o:p>
Bypass Proxy for local address<o:p></o:p>
Next I made sure that the following had red dotted lines:
Address<o:p></o:p>
This still didn't work, so I went through my 'Do Not use proxy servers for addresses beginning with' removed all
of these and then re-added one by one until the problem materialized.  The first issue was when using wildcards I had added an entry with the following:
http://domain.subdomain.com/*
Then caused my proxy fields not to be applied, I re-added this just with:<o:p></o:p>
http://domain.subdomain.com/
<o:p>This next one is IMPORTANT.</o:p>
I had these entries in a Word document of which I had copied and pasted from the entry box for 'Do
Not use proxy servers for addresses beginning with'.  As shown in the screen shot above provided by SVEN_BURGER I had very similar entries:
http://domain.subdomain.com/;10.*.*.*;172.27.*.*;http://172.27.*.*
Each time I copied and pasted the line (+ more) above the proxy field on the Windows 8.1 client
be blank after using 'gpupdate /force' I then noticed that in my Word document the whole string was being seen as 1 URL due to the http part at the beginning, so I changed my entry to look like this:
10.*.*.*;172.27.*.*;http://172.27.*.*;http://domain.subdomain.com/
I again noticed that this section:
http://172.27.*.*;http://domain.subdomain.com/
Was being seen as one URL in my Word document.  To resolve this I had to add the URL's individually and
apply and OK these before going back in and making the next entry.  So I ended up adding them all individually after separating the
URL's in my Word document.
I hope this helps.