A method of communicating over a communications system includes determining that a communication event at a user terminal of the communications system requires use of a feature for processing data, the communication event being over the communications system and determining that the feature required by the communication event is not enabled for use at the user terminal when the communication event is initiated. Following the step of determining that the feature is not enabled, the method further includes retrieving a certificate enabling the use of the feature at the user terminal and using the feature at the user terminal to process data of the communication event.