I used to be able to do it, but now whenever I change a UUID, the ESXi or Workstation automatically revert back . Could anybody give me a hint. This is the UUID I'm trying to change to . 42 29 DF DC 9B 3C 51 19 34 CC 72 C1 E0 27 30 95 I've tried making sure that the workstation is shutdown and that VM is shutdown, etc.