How to change the UUID of a VM via the PowerCLI

In vCloud director it may be necessary to deploy an identical vApp, when this happens everything is identical (including UUID's), to help vSM differentiate the VMs changing the UUID may help.

$date = get-date -format "dd hh mm ss"

$newUuid = "56 4d 50 2e 9e df e5 e4-a7 f4 21 3b " + $date

$spec = New-Object VMware.Vim.VirtualMachineConfigSpec

$spec.uuid = $newUuid

$vm = get-vm <VM Name>

echo "VM: " $ "New UUID: " $newuuid