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+#Script returns total disk usage by all Powered On VMs in the environment in Gigabytes
+#Author: Chris Bradshaw via  https://isjw.uk/using-powercli-to-measure-vm-disk-space-usage/
+
+[math]::Round(((get-vm | Where-object{$_.PowerState -eq "PoweredOn" }).UsedSpaceGB | measure-Object -Sum).Sum)