The OPC Alarm.NET license enables local and remote OPC Alarm.NET window components to interact with this OPC Systems Service. No license is required for the OPC Alarm.NET components on remote systems to work with this local OPC Systems Service. If a license is available real-time and historical alarm data will be provided to all local and remote OPC Alarm.NET systems. The OPC Alarm.NET license also enables the Alarm Logging feature for use on the local system. A valid license will allow to log alarms from the local system and any remote OPC Systems Service with an OPC Alarm.NET or OPC Web Alarm.NET license. Alarm Notification is also enabled with a license of OPC Alarm.NET.