Visual Studio Error 407 Proxy Authentication Required

Question

I am behind a corporate proxy server which requires credentials  I have been trying to connect to a TFS server  on tfspreview com  with MS Visual Studio Pro 2012 for the last 2 hours with no success  Every attempt has been met with this error     The integrated browser works fine when I initiate it  It asks me for my proxy login credentials and once entered  off I go  So there is some different method of connection happening here   I have also navigated to the TFS server  and once in my project I clicked Open new instance of Visual Studio  The new instance fails with this message in the output   HTTP code 407  Proxy Authentication Required   I have tried everything that I found on another post to no avail  I have made every edit and combination edits to devev exe config that I have found with no success   Could it be that the 2010 version is somehow different than the 2012 Pro edition  I am running Windows 7   Can anyone shed some light  Please   Note  This problem also applies to Visual Studio 2013

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My case is when using two factor auth  outlook account and VS12   I found out I have to    open IE  my corporate default browser  log in to visual studio online account  including two factor auth  connect again in VS12  do the auth again for some reason

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Download and install Fiddler  Open Fiddler and go to Rule menu to tick Automatically authenticate  Now open visual studio and click on sign-in button    Enter your email and password   Hopefully it will work

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I was getting an  authenticationrequired   407  error when clicking the  Sync  button  using the MS Git Provider   and this worked for me  VS 2013       Program Files Microsoft Visual Studio 12 0 Common7 IDE devenv exe config     lt system net gt       lt defaultProxy useDefaultCredentials  true  enabled  true  gt         lt proxy proxyaddress  http   username password proxyip port    gt       lt  defaultProxy gt       lt settings gt         lt ipv6 enabled  false   gt         lt servicePointManager expect100Continue  false   gt       lt  settings gt     lt  system net gt    I think the magic for me was setting  ipv6  to  false  - not sure why  perhaps only IPv4 is supported in my case    I tried other ways as shown above  but I move the  settings  section AFTER  defaultProxy   and changed  ipv6   and it worked perfectly with my login added  every other way I tried in all other answers posted just failed for me    Edit  Just found another work around  without changing the config file    For some reason  if I disable the windows proxy  it s a URL to a PAC file in my case   try again  it will fail   and re-enable the proxy  it works  Seems to cache something internally that gets reset when I do this  at least in my case

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Using IDE configuration    Open Visual Studio 2012  click on Tools from the file menu bar and then click Options  From the Options window  expand the Source Control option  click on Plug-in Selection and make sure that the Current source control plug-in is set to Visual Studio Team Foundation Server  Next  click on the Visual Studio Team Foundation Server option under Source Control and perform the following steps  Check Use proxy server for file downloads  Enter the host name of your preferred Team Foundation Server 2010 Proxy server  Set the port to 443  Check Use SSL encryption  https  to connect  Click the OK button    Using exe config   Modify the devenv exe config where IDE executable is  like this    lt system net gt        lt defaultProxy gt           lt proxy proxyaddress    http   proxy 3128         bypassonlocal    True    autoDetect    True      gt          lt bypasslist gt           lt add address    http   URL     gt          lt  bypasslist gt       lt  defaultProxy gt           Declare your proxy at proxyaddress and remember bypasslist urls and ip addresses will be excluded from proxy traffic       Then restart visual studio to update changes

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While running Visual Studio 2012 behind a proxy  I received the following error message when checking for extension updates in the Visual Studio Gallery   The remote server returned an unexpected response   417  Expectation failed  A look around Google finally revealed a solution here   Visual Studio 2012 Proxy Settings  http   www jlpaonline com  p 176  Basically  he s saying the fix is to edit your devenv exe config file and change this    lt settings gt            lt ipv6 enabled  true   gt    lt  settings gt    to this     lt settings gt      lt ipv6 enabled  true   gt            lt servicePointManager expect100Continue  false   gt     lt  settings gt

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The solution that worked for me in both Visual Studio 2013 and Microsoft Test Manager  MTM  was to ensure that both devenv exe config and mtm exe config included this configurations section    lt system net gt       lt settings gt           lt ipv6 enabled  true   gt           lt servicePointManager expect100Continue  false   gt       lt  settings gt       lt defaultProxy useDefaultCredentials  true  enabled  true  gt           lt proxy usesystemdefault  True    gt       lt  defaultProxy gt   lt  system net gt    MTM did not have a system net setting and the whole section was added immediately following the closing xml tag  lt  appSettings gt

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After three days of searching  the solution fell into my lap   Now  what happened was VS tried to do an automatic update but was stopped by the proxy  I was prompted for credentials and the check took place   I was inspired to check the TFS server connection just for kicks in case that prompt would possibly establish a connection for the TFS server to tunnel through    lo and behold  It worked   WORKAROUND    Open TOOLS Extensions  amp  Updates Click on Updates    in the left-hand menu There will be a failure notice on screen and a link to enter your credentials  Click it and enter them  Close the Extension manager  Click TEAM Connect to TFS server    Enter the address and it will work    Note  Some have suggested trying to use the proxy credential prompt by opening the integrated browser but this has not worked  I am not an expert but I think they are connecting through different channels within windows itself   There is no editing of devenv exe config required for this to work   It will be a pain to have to check for updates manually every time you need to connect to the server  but this is the best solution I have come up with until Microsoft fixes this issue permanently with an update or future release

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The situation is essentially that VS is not set up to go through a proxy to get to the resources it s trying to get to  when using FTP   This is the cause of the 407 error you re getting  I did some research on this and there are a few things that you can try to get this debugged  Fundamentally this is a bit of a flawed area in the product that is supposed to be reviewed in a later release   Here are some solutions  in order of less complex to more complex    If possible don t use the proxy for the specified domains that you re trying to get to   Set up your proxy settings correctly Internet Explorer  even if you don t use it  as that affects system wide settings  Even go so far as to connect to the internet with internet explorer and leave it connected then go back and try again from VS   In the devenv exe config add  lt servicePointManager expect100Continue  false    gt  as laid out below    lt configuration gt     lt system net gt       lt settings gt         lt servicePointManager expect100Continue  false    gt       lt  settings gt     lt  system net gt   lt  configuration gt     Add defaultProxy settings as follows    lt system net gt     lt defaultProxy useDefaultCredentials  true  enabled  true  gt         lt proxy proxyaddress  http   your proxyserver ip port   gt     lt  defaultProxy gt     lt settings gt          Alternately you could try telling it to use system default  which should pull from internet explorer  like so    lt defaultProxy useDefaultCredentials  true  enabled  true  gt       lt proxy usesystemdefault  True    gt   lt  defaultProxy gt    There is an older solution involving creating a plugin here  Hope this solves it for you

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This helped in my case     close VS instance open Control Panel User Accounts Credential Manager Remove TFS related credentials from vault   This is just a hack  You need to do it regulary      -   Best regards   Alexander

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I faced the same error with my Visual Studio Team Services account  formerly Visual Studio Online  Team Foundation Service     I simply entered the credentials using the VS 2013  Connect to Team Foundation Server  Window  and then connected it to the Visual Studio Team Services Team Project  It worked this way

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I was having the same problem  and none of the posted solutions worked  For me the solution was    Open Internet Explorer   Tools   Internet Options Click Connections   LAN settings Untick  automatically detect settings  and  use automatic configuration script    This prevented the proxy being used  and I could then authenticate without problem

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I got this error when running dotnet publish while connected to the company VPN  Once I disconnected from the VPN  it worked

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I was trying to connect Visual Studio 2013 to Visual Studio Team Services  and am behind a corporate proxy  I made VS use the default proxy settings  as specified in IE s connection settings  by adding    lt system net gt       lt defaultProxy useDefaultCredentials  true  enabled  true  gt           lt proxy usesystemdefault  True    gt       lt  defaultProxy gt       lt settings gt           lt ipv6 enabled  true   gt       lt  settings gt    lt  system net gt    to    Program Files Microsoft Visual Studio 12 0 Common7 IDE devenv exe config  running notepad as admin and opening the file from within there

[visual-studio] Visual Studio Error: (407: Proxy Authentication Required)

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