Change Virtual Machine reservation before creating VM in vCenter using vRO

Hi, I'm cracking my head with this scenario:

I'm creating a Blueprint for deploying a Windows VM in a vSphere environment. On this blueprint I'm setting up some custom properties (using the Property Dictionary) to pass information to vRealize Orchestrator, from there I pretend to change the reservation dinamically, using the received parameters. Although I can change the entity's HostReservation, this doesn't seem to be reflected during the VM creation.

Did some one try to use a similar way to change reservations dinamically? Thanks!

Best regards,

Fabricio.