ESXi freeware version” as it’s all the same hypervisor software. VMware ESXi, the software will work with full functionality for 60 days. After 60 days, the admin needs to add a license, or the system will be limited to a maximum of 32 Gig of RAM for the server. Advanced features will also be disabled (DRS, vMotion), but these are not required for PI. Using a “free” ESXi is very popular by many customers and account teams, especially for Prime products. It allows a customer to purchase a low cost UCS with 24 gig of RAM, install VMware ESXi for free and then add Prime virtual appliances. This way the customer can use one physical server as a low cost PI/ LMS appliance, where both run on the same hardware with no OS cost.