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
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:
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.