We currently do not inform users, if a product license has expired. This leads to confusion as a disabled license causes functions to cease to work or even disappear. For administrators, it means that instances can go down due the license expiration without any proper notification.
There's a UX concept that describes how we handle the product license. In terms of notifying users, it calls for administrators to be warned if a license is about to expired, and for all users to be notified in Pulse using an error message, in case the license has expired.