SRM is DR Automation tool from VMware. From the licensing point of Site Recovery Manager can be purchased either as a standalone product or as part of VMware vCloud Suite® Enterprise Edition. As a standalone product, Site Recovery Manager is available in two editions, Standard and Enterprise. Both editions can only be licensed “per protected virtual machine.” A “protected virtual machine” is defined as a VM that is part of an SRM protection group, regardless of the state of the VM. Site Recovery Manager Enterprise Edition can also be purchased as part of vCloud Suite Enterprise Edition. In this case, Site Recovery Manager is licensed per “per protected processor.” Let's discuss what's the difference in between these two editions?