Abstract: A join service joins first and second computerized meetings. The join service receives information about the first and second computerized meetings from respective first and second meeting services. In response to a request from one of the first and second services to join the meetings, the join service translates audio, video, and data signaling between the first computerized meeting service and the second computerized meeting to join participants in the first computerized meeting and participants in the second meeting in a combined computerized meeting. An alternative join service obtains a uniform resource indicator (URI) for an agent of the first meeting. In response to a request from a participant in the second meeting to access the first meeting, the join service provides the URI to the second meeting service to allow the second meeting service to join the second meeting to the first meeting.