Can I just shut down the server at the VM level (right click server and power off)??
You could, but you'll want to do a few things before that...
What I would do is have Portico up and running on the A side for the Router, Logger, and PGs. I'd start stopping services one-by-one and watching Portico on the A side to make sure the necessary processes go Active (jtapi, pgagent, pims, etc..). Once the services are stopped and the A side is active for the Router, Logger and PGs... then yes, you can shutdown the VM guests. Make sure CVP doesnt have any active calls, and you can monitor this from Ops Console. If there are active calls or there are VXML sessions happening, then simply do a graceful shutdown.
