A computer-implemented method of alerting users to collaborative activity can include receiving a user input selecting at least one of a plurality of data types to be included within a notification, wherein the plurality of data types correspond to collaborative session data exchanged during a collaborative session among a plurality of users. The method can include buffering collaborative session data during the collaborative session and responsive to detecting an occurrence of an awareness triggering event, outputting the notification comprising at least a portion of the buffered collaborative session data corresponding to the selected at least one of a plurality of data types.