In one embodiment, a scheduled collaboration session in a social network is detected, the scheduled collaboration session to occur at a time in the future and at that time provide real-time communication among participants. A plurality of participants expected to attend the scheduled collaboration session are detected. A subject matter of the scheduled collaboration session is detected. One or more key words are derived from the detected subject matter of the scheduled collaboration session. Profiles maintained in the social network for the plurality of participants expected to attend the scheduled collaboration session are updated based on the one or more key words, the updating to include refining an area of expertise indicated in the profiles.