Supported Upgrade Paths

You can upgrade Visual Studio Team System 2008 Team Foundation Server in the following ways:

·        From a prerelease version to the released version

·        From the trial edition to the workgroup edition

·        From the trial edition to the full edition

·        From the workgroup edition to the full edition

For more information, see the following links:

http://msdn2.microsoft.com/en-us/library/ms404844.aspx

http://msdn2.microsoft.com/en-us/library/ms404852(vs.80).aspx