In Windows and on UNIX, you can set the CLASSPATH by using the PluginPolicy.Progress.SonicMQ section in the AdminServerPlugins.properties file. BrokerConnect uses the pluginclasspath property. ClientConnect and ServerConnect use the classpath property.
Note: If you want to set the classpath for using the generic Java Message Service (JMS) adapter, see OpenEdge Development: Messaging and ESB.