So we found out today that we can't revert snapshots using the CLI tools with the free license of ESXi 5.5. We get a "RestrictedVersionFault" error when attempting to do that. We have about 7 VMs deployed in this server. The server is a dual socket Xeon quad-core with 32GB of RAM. So my question is, what is the minimal license upgrade that I would need in order to be able to revert VM snapshots via the command line with the current configuration? Would the VMware vSphere Essentials Kit do the trick?