I am currently running 4 VM's on a server that has 2008r2 Standard on it. I have 64GB of memory on the machine but standard limits you to 32GB. I was going to use the DISM tool with server 2008r2 which from what I have read should work for what I need.
My question comes down to am I able to run that tool on my server without moving my VM's off of the machine. I do not have another machine right now to move them to. I was wondering if I just shut down the VM's could I then run the tool and upgrade my host edition to enterprise? Also if I am able to do that then should I go to Enterprise or to datacenter edition. Which will be the best for my virtual environment? I would like to add a 5th VM, but can only do this edition change once so want to get it correct the first time.