Methods and systems are disclosed for collecting presence information from multiple utilities associated with a user and creating merged presence calculation information where events are determined to be analogous in content. The analogous content may relate to one or more of timing, context, user information, location, and the like. More specifically, email out-of-office and calendar events may be treated as analogous events. From the analogous events, merged presence calculation information is created and then provided to a presence server for an efficient aggregate presence calculation.