Before I left on vacation a couple of weeks ago I was working with another developer on a story that made use of some 3rd party services on a VM.  Before leaving I gave him my VM to use so we could avoid the unnecessary PITA of configuring  a new environment. 

Unfortunately now that I've come back I would like to run my VM again, but I can't since he is still running it and we can't share instances (isolated development environment). 

What I ended up doing was taking the VM image as I had it before I left and essentially cloned it.  By renaming the PC and changing the SIDs on the box I essentially have a cloned VM that will peacefully coexist on the same Windows network.

Here are the steps to take an existing VM joined to the domain and essentially clone it as a different machine.

1.       Unjoin the machine from the domain.  Reboot.

2.       Download NewSid utility from Microsoft (sysinternals).

3.       Run NewSid from the command line: newsid /a mynewpcname

4.       After reboot, login and rejoin the PC to the domain.

5.       Done

From then on the two VMs can coexist with one another on the same network and domain.