I need to clarify some licence configuration to make my desing. I have an IPO 500 with VMPro + 1XP in a Virtual Machine R9.0. I need to add another IPO in SCN and the client is requesting to put Power Users or Softphone in the new site. I need to put Preferred Licencence in this site? I think if I can configure Centralized VoiceMail and register the UC applications in the Virtual Machine I only need Essential (with the VoiceNetownking licences in both sides, of course) in the new site.