From the subscriptions page, select your SaaS license, and click on the Manage My Notifications tab.
Use the checkbox to subscribe or unsubscribe to email notifications about your license (such as upgrades and extensions) or controller maintenance and click Save Changes button.
Note: New users are, by default, subscribed to both maintenance and license notifications. Primary users can't unsubscribe from license notifications. Users may change their default settings, but AppDynamics recommends that at least one person in your organization remains subscribed to these notifications to avoid missing out on critical updates.