ENS2 can be deployed on a cloud-hosted service or on an on-premises set up. This topic describes configuring ENS2 on cloud and on-premises environment. Email Notification Service for CloudUse Workspace ONE UEM console to configure Workspace ONE Boxer for your cloud deployment. Email Notification Service for On-PremisesConfiguring ENS for your On-Premises deployment in a 3-step process. ENS2 Application Configuration Keys for BoxerConfigure the ENS2 with the application configuration values. You can configure settings for the ENS2 using the configuration key and configuration value provided by the Workspace ONE UEM. Migrating from ENS On-Premises Server to Cloud ServerThis topic describes the information required to migrate from the ENS on-premises server to the cloud server. Configuring SEG as the EWS Proxy for ENSMonitor compliance of the client with the ENS2 environment so that ENS2 together with SEG V2 can block or unblock a client depending on the compliance criteria of the client. Enable Certificate-Based Authentication for ENSENS supports certificate-based authentication (CBA) and dual authentication. The dual authentication is a combination of basic authentication and certificate-based authentication. For ENS, you must configure the Boxer application with certificate-based authentication for Exchange server and enable certificate-based authentication for the EWS endpoint. ENS uses the same certificate that the Boxer application receives for the authentication purpose. ENS must ensure that the EWS endpoint can validate the certificates used by the Boxer application.