A method of scheduling meetings within a calendaring system can include receiving a meeting request specifying a meeting time, at least one participant, and a supplemental meeting service to be scheduled concurrently with the meeting. A determination can be made that a supplemental meeting system is not available. Accordingly, participants can be notified of the meeting time and that supplemental meeting service information has not been determined. The method also can include attempting to obtain the supplemental meeting service information from the supplemental meeting system until a predetermined time prior to the meeting time. If the supplemental meeting service information is obtained before the predetermined time prior to the meeting time, the participants can be notified of the supplemental meeting service information.