To clone an instance of a TFS server while the current live instance is running it is required to take backups as explained in “Cloning Your TFS Server Part 01 – Backing Up and Restoring Databases” and restore the DBs in new hardware. After that there should be preparation activities run as described in “Cloning Your TFS Server Part 02 – Prepare Restored Databases” to make sure the current and cloned TFS instances are not getting corrupted, when both running simultaneously in the same network. Let's go through the configuration steps to configure the cloned TFS instance.
Check the SSRS reporting is referring to the cloned server. In case if it is connected to live TFS server reporting instance make sure to remove it and connect to the cloned server reporting services.
As the last step you should remove all lab management configurations from the cloned TFS collections. to do this you can run TfsConfig.exe lab /delete /collectionName:collectionName . It might give error below if SCVMM (System Centre Virtual Machine Manager) Administrator Console, is not available in AT.
TF255384: Team Foundation Server could not find a supported version of Virtual Machine Manager Administrator Console on a logical application tier server. Confirm that SCVMM Administrator Console is installed. Then try the operation again.
Download SCVMM 2008 R2 or any other version of SCVMM stated in the error message. SCVMM 2008 R2 available here. Then run the setup and install Admin Console.
You should have your cloned TFS instance running simultaneously with your live TFS.