A method for associating a calendar invitation for a calendar event to a web conference for a web conference event is provided. Invitees of a calendar invitation for a calendar event are received and are detected. The invitees of the calendar event are associated to a web conference event. Modifications relating to the invitees of the calendar event are detected. Modifications relating to the invitees of the calendar event are propagated to the web conference event, and the web conference event synchronizes with the calendar event. Modifications relating to the web conference event for the web conference are detected. Modifications relating to the web conference event are propagated to the calendar event, and the calendar event synchronizes with the web conference event. The invitees of the calendar invitation include first, second, and/or third tiers, and the tiers relate to user roles and privileges, such as a hidden or anonymous presence.