Windows 8.1 and proxy authentication for Windows Store Apps RRS feed

  • Question

  • Should Windows Store apps be able to connect through a corporate proxy that requires authentication in Windows 8.1?

    We use TMG 2010 with the TMG Proxy client installed on the desktop. No matter how I configure the proxy settings in the System Settings, metro apps never prompt for credentials and can't connect.

    According to one KB article I read, this issue was supposed to be addressed in 8.1. So far that does not seem to be a case.

    Wednesday, August 7, 2013 4:13 PM

All replies

  • Hi,

    Here is a link below about Windows 8 Modern UI Apps and Forefront TMG 2010, Hope this helps.


    Friday, August 9, 2013 11:54 AM
  • Thank you, I have already conversed with the author in the comments of that post after the release of 8.0. Since then MS stated in this KB article (http://support.microsoft.com/kb/2778122/en-us) that the authenticated proxy issue was scheduled to be addressed in 8.1. I see that they have given us proxy configuration options, but no way to configure credentials globally.

    In this KB article (http://support.microsoft.com/kb/2777643/en-us) Microsoft states that the ISA Firewall client does not work with Windows 8 Store apps.

    Friday, August 9, 2013 6:49 PM
  • Hi, Tim

    Actually, you can set proxy for your Windows 8 APP by editing Group Policy. try the method below.

    1. Open "Local Group Policy Editor"

    2. Navigate to "Computer Configuration - Administrative Templates - Network Isolation"

    3. Open "Internet Proxy Servers for Apps" and set the value to your proxy server address like

    Monday, August 12, 2013 3:39 AM
  • Can you confirm that this resolves the issue with a proxy server that requires authentication?  (http://support.microsoft.com/kb/2778122/en-us)

    I can set the proxy just fine, but there appears to be now way to pass credentials to the firewall. Also, since to date all of these devices are mobile, doesn't hardcoding the proxy cause problems when outside the corporate firewall?

    Monday, August 12, 2013 9:01 PM