If you want to use Visual Studio 2008 SP1 and Team Explorer 2008 to connect to a TFS 2010 server, you will probably hit the error while trying to add the server. It happen even when you install patch KB974558 (Team Explorer 2008 SP1 forward compatibility patch for TFS 2010)
The Team Explorer 2008 RTM build is 9.0.21022.8. If you install Visual Studio 2008 SP1 before installing Team Explorer, then you’ll have VS 2008 SP1 with Team Explorer RTM which does not work well together.
Figure 1 : this Team Explorer build does not work well with Visual Studio 2008 SP1 and TFS 2010
So the fast solution is to run the Visual Studio 2008 SP1 again. It will look for the Team Explorer version and update to SP1. After installation complete, we should see this:
Figure 2: Now the Team Explorer is patched to SP1 build : 9.0.30729.1, this version works with TFS 2010.
