Ciao, si è possibile eseguire il downgrade delle CAL di SBS 2011 a SBS 2008, ma non per la Premium Add-On. Il downgrade non è automatico e va richiesto al supporto Microsoft.
Dal licensing FAQ:
SBS 2008 has two CAL types like SBS 2011. The allowed downgrade from SBS 2011 CAL Suite will be to SBS 2008 CAL Suite, and there are not any downgrades available from SBS 2011 Premium Add-on CAL Suite to SBS 2008 CAL Suite for Premium Users or Devices.
This is due to the fact that the SBS 2011 Premium Add-on does not include the same components that are in 2008 Premium and therefore the SBS 2011 Premium Add-on CAL Suites do not offer downgrade rights. We will continue to offer SBS 2008 Premium CALs
on price lists for a period of time due to this constraint.