To deploy your NSS virtual appliance, the Zscaler service needs to compute the appropriate resources for your NSS. To learn more, see the deployment guide linked below for your platform:

You must be subscribed to NSS for Firewall, Cloud Connector, and Branch Connector to manage your Cloud & Branch Connector NSS.

• NSS Deployment Guide for Microsoft Azure
• NSS Deployment Guide for Amazon Web Services
• NSS Deployment Guide for VMware vSphere

For Cloud & Branch Connector, consider only the NSS for Firewall configurations in the deployment guides and ignore the NSS for Web configurations as they are not applicable.