A method is described and in one embodiment includes requesting from a calendaring system calendaring information for a participant in an online collaboration session, wherein the calendaring information includes free/busy information for the participant; receiving the requested calendaring information; verifying based on processing of the received calendaring information that the participant has a hard stop relative to an end of the online collaboration session, wherein the hard stop is a point in time at which the participant can no longer participate in the online collaboration session; and presenting on a display of user equipment associated with the online collaboration system a hard stop indicator for the participant a first amount of time prior to the hard stop, wherein the hard stop indicator is displayed proximate a representation of the participant.