Abstract: A messaging system for provision of instant messaging for a user entity (1) is disclosed. The user entity of a type that is adapted for communication via a first communication environment (10) based on a first protocol. The messaging system comprises a controller entity (6) for managing instant messaging between user entities (1-4) in the messaging system. The controller entity is provided in a second communication environment (12) and operates in accordance with a second protocol. The controller entity comprises means for maintaining information regarding the status of said user entity.