License requirements for AS alone at a site
Automation Server alone or with other Automation Servers at a site which has no Enterprise Server or WorkStation.
Question on License requirements for AS alone at a site
A standalone AS where no web services or Technician Tool are used does not require a license. Use of web services and/or tech tool requires a site license which means the use of a single Automation Server or multiple Automation Servers without license is a legal breach.