Windows 8.1 Metro Applications not functioning over VPN

Question

Has anyone been able to resolve this in a corporate environment?  We are not looking for loopback exemptions with fiddler, but rather a secure method to configure metro applications to use a proxy.  If we manually set the proxy configuration, it
works fine but of course breaks connectivity off VPN.  I've configured a pac file as this >
function FindProxyForURL(url, host)
 if ((isPlainHostName(host) ||
 dnsDomainIs(host, "corporatewebsite.com")) &&
 !localHostOrDomainIs(host, "corporatewebsite1.com") &&
 !localHostOrDomainIS(host, "corporatewebsite2.com") &&
 !localHostOrDoaminIs(host, "corporatewebsite3.com"))
 alert("This connection is going direct.")
 return "DIRECT";
 else{
 alert("This connection is going through proxy.")
 return "PROXY proxyaddress.com:9400";
When I configure a pac file under automatic settings in Internet Explorer, websites load correctly both internal and external.  When loading metro applications, internet connectivity fails.  I've also noticed that
netsh winhttp show shows that I'm still configured direct connection.
If I open fiddler and enable exemptions for Win8 metro apps, they work fine, but of course this 1) blows security 2) makes it very difficult to manage, especially 3rd party apps.
Any ideas?  Has anyone solved this?  Every post I've looked at has very little response back from Microsoft as to a proper configuration for this.   Thanks guys.
Ryan

Answer 1

Hi,
This is a continual problem indeed. As far as I know, there is still no a effective solution with APP network during some VPN connected.
While, Untill now, if you need to set proxy for Store APP separately, you can make setting through Group Policy.
Computer Configuration - Administrative Templates - Network Isolation - Internet Proxy Servers for Metro Style Apps
Roger Lu
TechNet Community Support