A method and system for tracking and editing a resource in a real-time collaborative session is provided. A collaboration system provides real-time collaborative sessions between participants. When a participant in a collaboration session uploads a non-editable copy of a resource for viewing in the collaborative session, the collaboration system records the participant who uploaded the non-editable copy of the resource as the owner of an original copy of the resource and the location of the resource on that participant's machine. When the same or another participant attempts to edit the non-editable copy of the resource during the collaborative session, the collaboration system locates the original copy of the resource and starts the sharing of the resource in an editable form in the collaborative session.