A conference management system, network, and method for enabling the management of teleconference resources across multiple telecommunications networks that serve multiple conference domains. A disclosed multi-domain conference manager (MDCM) subscribes to a network management platform and for one or more sets of entities. Each set defines a particular combination of i) communications service provider(s) (CSP) and ii) enterprise, in which the combination defines a particular scope of management. When a conference-related event occurs, such as a particular conference involving video endpoints being set up with a unified communications (UC) network, the MDCM can notify a CSP network that is within a same scope of management as the UC network, to report on related events as they occur. The MDCM can then coordinate the connection of resources associated with the multiple domains via a cascaded link between bridging resources that serve the different domains.