Or (since this is a forum about vCenter Orchestrator) you can use 'Change RAM' stock vCO workflow.
- Deploy vCO appliance VM
- Register the host where your vCenter VM is deployed in vCO
- Power off your vCenter VM
- Run 'Change RAM' vCO workflow.
Or (since this is a forum about vCenter Orchestrator) you can use 'Change RAM' stock vCO workflow.