The Server Virtualisation Validation Program (SVVP) is a simple 3-part process, that enables end Customers, and Partners to understand what is, and isn’t, from a Microsoft perspective, supported in virtual environments. These virtual environments could be Microsoft, VMware, Citrix, or another.  The current, complete list of SVVP certified virtualisation solutions are as follows: Cisco WAAS Virtual Blades 4.1, Citrix XenServer 5 Embedded Edition, Citrix XenServer 5, Citrix XenServer 5.5, SUSE Linux Enterprise Server 10 SP2, VMware ESX 3.5 Update 2, VMware ESX 3.5 Update 3, VMware ESX 3.5 Update 4, VMware ESXi 3.5 Update 3, VMware ESXi 3.5 Update 4, VMware vSphere - ESX 4.0, VMware vSphere - ESXi 4.0. Find out about virtualization support by clicking through this guide.