I would highly recommend to always use the latest PowerCLI version. At the moment this is PowerCLI 5.1 Release 2. The latest version has the most features and the least bugs. You can see in the release notes which vSphere and vCenter versions are supported. For PowerCLI 5.1 Release 2 these are:
VMware vSphere PowerCLI 5.1 Release 2 supports the following VMware environments:
- vCenter Server 5.1.0a
- VMware ESXi 5.1.0a
- vCenter Server 5.0 Update 2
- VMware ESXi 5.0 Update 2
- vCenter Server 4.1 Update 3
- VMware ESXi 4.1 Update 3
- VMware ESX 4.1 Update 3
- vCenter Server 4.0 Update 4
- VMware ESX 4.0 Update 4
- VMware ESX 4.0i Update 4
So ESXi 5.0 U2 and vCenter 5.0 U2. are fully supported in PowerCLI 5.1 Release 2.
You can check your PowerCLI version with the following PowerCLI command:
Get-PowerCLIVersion
PowerCLI 5.1 Release 2 also shows it version in the title bar of the PowerCLI window.
You can download the latest PowerCLI version from: http://communities.vmware.com/community/vmtn/automationtools/powercli
Message was edited by: Robert van den Nieuwendijk