This read-write flag controls whether Cisco Unity Express generates its SNMP notifications, such as application, storage, and security alerts, at all. Since the description notes it defaults to true because notification frequency is low, an admin would typically only disable it in unusual cases, and doing so would silence all the alert traps listed for the system, including storage and security warnings. If an admin mistakenly sets cueNotifEnable to false while troubleshooting, they would stop receiving the storage alert traps that would otherwise warn them about mailboxes filling up.