Problem:

When you access the TFS 2012 from Visual Studio in another domain, you may receive the following exception.

————————— Microsoft Visual Studio ————————— Team Foundation Error: Logon failure: unknown user name or bad password ————————— OK   —————————

Solution:

Open Visual Studio using following command

C:\Windows\System32\runas.exe /netonly /user:domain\user “C:\Program Files\Microsoft Visual Studio 11.0\Common7\IDE\devenv.exe”