Unified communication system

A unified communication system is disclosed that allows a variety of end point types to participate in a communication event using a common, unified communication system. In some implementations, a calling party interacts with a client application residing on an endpoint to make a communication request to another endpoint. A communication event manager residing in the unified communication system selects a script from a repository of scripts based on the communication event and the capabilities of the endpoints. A communication event execution engine receives a user profile associated with at least one of the endpoints. The user profile can be configured by the user to describe the user's preferences for how the communication should be processed by the unified communication system.