To utilise a SerializationContextInitializer on the server it's necessary for the implementation to be specified via the xml configuration. However, it should be possible to utilise the Server's Extensions to automatically load and configure any SerializationContextInitializer implementations that are placed on the servers classpath by the user. This will remove a configuration step when utilising the normal server, but will have the bigggest impact on the server image, as it will be possible for users to mount a volume with the jar(s) containing the desired SerializationContextInitializer implementations without changing the xml.