A system and method for establishing trust between management entities with different authentication mechanisms in a computing system utilizes a token exchange service to acquire a second security token used in a second management entity in exchange for a first security token used in a first management entity. In an embodiment, an endpoint is set at the first management entity as an authentication endpoint for the second management entity, which is used to authenticate a request with the second security token that is sent from the first management entity to the second management entity. After authentication, the request is processed at the second management entity and a response is transmitted to the first management entity.