A computer system and method is disclosed for automatically establishing a screen sharing session between a first party and a second party based upon device associations. A computer telephony system establishes a telecommunication session between at least a first and second party. The computer telephony system receives a request for a screen sharing session from one party to the telecommunication session. Using a configuration plan, the computer telephony system is able to determine the proper computing devices between which to establish the screen sharing session absent user entry. A screen sharing session is created between the parties of the telecommunication session and optionally tied thereto.