If you have used the New Era of Networks Rules and Formatter support in WebSphere MQ Integrator Version 2.1 and want to continue using it after migration, migrate to WebSphere Business Integration Message Broker with Rules and Formatter Extension Version 5.0 by following the instructions in Migrating from WebSphere MQ Event Broker Version 2.1 and WebSphere MQ Integrator Version 2.1 to WebSphere Business Integration Message Broker with Rules and Formatter Extension Version 5.0.
To migrate a WebSphere MQ Event Broker Version 2.1 broker domain and a WebSphere MQ Integrator Version 2.1 broker domain into a single WebSphere Business Integration Message Broker Version 5.0 broker domain, follow the instructions in Migrating from WebSphere MQ Event Broker Version 2.1 and WebSphere MQ Integrator Broker Version 2.1 to WebSphere Business Integration Message Broker Version 5.0, replacing all references to "WebSphere MQ Integrator Broker" with "WebSphere MQ Integrator".