This issue occurs when using Visual Studio 2005 or VS 2008 without the compatibility update installed. If you have already installed the compatibility update then its possible that the URL used is incorrect. Verify that the URL for TFS meets the following format http://YOURTFS:8080/tfs . If you have not installed the update you will need to do so in the specific order below.
ERROR: TF31002: Unable to connect to this Team Foundation Server: tfs2010.
Visual Studio 2005 to TFS 2010
The process must be completed in the exact order to work.
Visual Studio 2005
On the Visual Studio Toolbar go to Tools and select Connect to Team Foundation Server

Select Servers
Select Add and enter the server details http://tfs2010:8080/tfs
*The Connection Details on the screen should gray out after entereing the URL. If this is not the case, then the “Forward Compatibility Service Paack” has not been installed or the order it was intalled is incorrect. *
Connection Completed
Visual Studio Team System 2005 Team Explorer
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=7203
Microsoft® Visual Studio® 2005 Team Suite Service Pack 1 http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=5553
Visual Studio Team System 2005 Service Pack 1 Forward Compatibility Update for Team Foundation Server 2010 http://www.microsoft.com/download/en/details.aspx?id=3263
Connecting to TFS 2010 from Visual Studio 2008
Visual Studio 2008 (The Same process as above with the following software below)
Here’s quick list that I put together to use as a reference for making changes and staying up to date with TFS information.
Visual Studio Gallery
- http://visualstudiogallery.msdn.microsoft.com/en-us
MSDN Team System Home
- http://msdn.microsoft.com/en-us/teamsystem/default.aspx
Team System Downloads
- http://msdn.microsoft.com/en-us/teamsystem/dd408375.aspx
TFS Virtual Image
- This image contains a full TFS installation as well as Visual Studio 2008 Team Suite. go.microsoft.com/fwlink/?LinkId=120876.
TFS Power Tools
- Visual Studio Team System 2008 Database Edition Power Tools go.microsoft.com/fwlink/?LinkId=120940
TFS MSDN Library
- http://msdn.microsoft.com/en-us/library/fda2bad5.aspx
Make Basic Customizations to a Work Item Type
- http://msdn.microsoft.com/en-us/library/ms400654.aspx (Also Includes How To add a Custom State)
MSDN Forums
- http://social.msdn.microsoft.com/Forums/en-us/categories/
Sayed Ibrahim Hashimi
- http:/sedodream.com/default.aspx
Bharry’s Blog
- http://blogs.msdn.com/bharry/
Developer Support Team
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