Change Instance UUID for VM in ESXi - Server Fault
serverfault.com › questions › 793622You do not need to unregister unless its on a single host. Download the vmx file from the VM`s folder. Edit the bios.uuid and vc.uuid in the file. Upload the new vmx to the VM`s folder. Migrate the Vm to another host using the Webclient, this then forces a change in UUID as it notices its been changed. Boot the machine up now and it will have a new UUID.