The Cisco Email Security Appliance Advanced Phishing Protection with On-Premise Sensor is a subscription license designed for 1 user over a 3-year period. This software provides advanced protection against phishing attacks, ensuring that your email communications remain secure. It is available via electronic distribution and is ideal for organizations looking to enhance their email security measures. The licensing option is affordable and allows for software operation across multiple computers, making it a versatile choice for businesses. With a validation period of 3 years, you can be assured that your software will remain up and running without interruption.