The InternalLicensingEnabled parameter cannot be set to $false because there is a UM Mailbox Policy ('{0}') with ProtectAuthenticatedVoiceMail ...

The InternalLicensingEnabled parameter cannot be set to $false because there is a UM Mailbox Policy ('{0}') with ProtectAuthenticatedVoiceMail set to {1}.  Set this UM Mailbox Policy setting to 'None', then run this command again.