A network server creates a database storing a list of end-user devices associated with a user, object types that can be handled by the respective end-user devices, and actions that can be performed by the respective end-user devices for handling objects of the respective object types. One of the end-user devices detects that it is unable to handle an object and makes a request to the network server that a different, unspecified device handle the object instead. The network server, having received the request that an unspecified device handle the object, selects a device associated with the user to handle the object based on the database, and invokes that device.