Upgrade Team Foundation Server 2008 Trial to Full Edition
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:
https://msdn2.microsoft.com/en-us/library/ms404844.aspx
https://msdn2.microsoft.com/en-us/library/ms404852(vs.80).aspx