A program receives a state change that occurred for an event created by an application. The event includes a creator of the event, a set of objects, and a set of sources. The program further identifies a schema definition in a plurality of schema definitions based on a type of the state change that occurred for the event. Each scheme definition in the plurality of schema definitions specifies a type of state change and a set of information associated with the event. The program also generates a message that includes the set of information associated with the event specified in the identified schema definition and a set of targets. The program further sends the message to a message management platform in order for the message management platform to send to an application for presentation to each target in the set of targets through a web portal provided by the application.