Because I keep Team Explorer open when I work with my CodePlex projects, every time I start Visual Studio it prompts me for my CodePlex credentials, even if I haven’t yet selected a project to open yet. Sadly, there is no “Save my credentials” checkbox when logging into the TFS server.

There is a straightforward workaround. The answer is here:

http://codeplex.codeplex.com/Thread/View.aspx?ThreadId=41734

W3bbo:

I've just found a work-around (if not a solution) by twiddling around:
(Windows XP x64, domain-member computer, so I get the 'advanced' Users control panel)
Start > Settings > Control Panel > User Accounts > Advanced > Manage Passwords > Add
Server: tfs03.codeplex.com
Username: snd\W3bbo_cp
Password: yada
And hey-presto, no more prompts.

ulkram:

In vista, the option is called Manage network passwords.

Worked for me. W00t and stuff.