Abstract: Presentation and/or sharing status related information about a user is provided through a presence channel to alert existing or potential participants in a communication session. When the user is in a display sharing environment, giving a presentation, or sharing a display screen with other users, his/her state is detected. A presence status display may then be provided to other users in communication with the user or attempting to establish a communication session with the user alerting them that the user has duplicated their display onto other screens or display devices or has shared their desktop with one or more other users. A number of heuristics may be employed to determine presenting or sharing state of the user such as detection of display sharing, active presentation applications, calendar entries, active communication applications, facial detection through image capture devices, and the like.