Thanks for quick response,
vcli is installed on vcenter (yet to install powercli) as everything is locked down and firewalled (We connect to the vcenter server via management servers) hence I can't run the script from elswehere?
Still a bad idea? (I run the vcli script early in the morning when there is least load and set it to terminate prior to start of working day if it is still running - is that where you are coming from?)
cheers