Getting 407 Proxy Authentication Required on startup RRS feed

  • Question

  • Hi there!

    Got myself a brand new computer with Windows 8.1 Pro installed. The old one had Windows 7. Running VS 2013 on both machines on the corporate network, which uses a proxy for internet access, I notice one slight difference in behaviour:

    On the new machine, every single time I start VS, I get this popup:

    Microsoft Visual Studio
    HTTP code 407: Proxy Authentication Required ( The ISA Server requires authorization to fulfill the request. Access to the Web Proxy filter is denied.  )

    I notice that in the background, the start page of VS states "Announcements: Updating the news channel...". That doesn't change until I click ok on the popup. After that, the news list is populated like there never was a problem.

    So why is it that VS feel the need to inform me of this proxy problem, when it's obviously not a problem once I click OK? It's becoming quite annoying to see this popup every single time I start VS. And it never shows up on the Win7 computer, using the same proxy server (and settings). Instead, it's displayed as a single line notification in the Output window.

    How can I make VS "use the proxy settings immediately", instead of "after first access failure" which seems to be the current setting?

    (The workaround mentioned on http://stackoverflow.com/questions/13717815/visual-studio-error-407-proxy-authentication-required does not apply, since I do not get a popup asking me to submit my credentials, so please don't ask me to try that one.)

    • Edited by Magnus Hedberg Thursday, November 20, 2014 10:16 AM Apparantly, you can add images while editing, but they do not publish...
    Thursday, November 20, 2014 10:15 AM


  • Hello Magnus Hedberg,

    Have you tried configure the following sites:

    "app.vssps.visualstudio.com; app.vssps.visualstudio.com:443; visualstudio.com; live.com; microsoft.com; *.accesscontrol.windows.net"

    in your proxy to make them allowed for you to access?

    Or you may try the solution listed on MSDN here:


    Can the issue be solved?


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    • Marked as answer by Barry Wang Friday, November 28, 2014 4:43 AM
    Friday, November 21, 2014 2:59 AM