How can I move or clone my Team Foundation Server installation?
You can move or clone your deployment of Team Foundation Server (TFS) software. You move TFS from one machine to another by restoring it to new hardware (called a restoration-based move). For example, you might want to move TFS to a server with greater capacity or improved processing speed. When you move to a new server you do not lose any of your project history.
To clone your TFS deployment, you perform the same steps as a move plus a few additional ones.
You perform a move when you plan to discontinue use of the original hardware and TFS deployment. You perform a clone when you intend to continue using the original TFS instance.
Please see Move or Clone Team Foundation Server from one hardware to another for details