The XC640/XC740xd system running Nutanix® software is the Dell EMC-Nutanix co-branded, hyper-converged virtualization infrastructure. It simplifies virtualization by converging computer and storage into a single appliance to be deployed in a clustered environment. Citrix has validated XenServer as a valid operating system for the XC640Core and XC740xdCore. This is only a validated operating system and not a fully supported operating system from Dell EMC. XenServer is listed on the Citrix HCL for XC640 and XC740. XC PG team has validated no issues with XenServer, however, this is not a fully supported operating system. (Meaning all support for XenServer must go through Citrix via the customer support contract with Citrix). Dell EMC will not preload XenServer from the factory. If deployment services are required, it will be via a custom bid and at the discretion of the deployment services team.