Tip: Getting rid of the persistent authentication box when accessing Team Foundation Server
Have you set up the workgroup version of Team Foundation Server, and you keep getting an authentication box everytime you connect to the Team Portal or Report Server? It's a basic thing (and quite annoying at times).
Here is how you can get around the problem. Open up Internet Explorer. Click on Tools > Internet Options. Click on the Security tab. Select Custom Level button and scroll to the bottom of the list. Under User Authentication, select "Automatic logon with current username and password". Click OK and problem solved!