If you want to use any custom or third-party jar files with an Integration Server instance, store them in the Integration Server_directory \instances\instance_name\lib\jars\custom directory. For example, if you want to use a third-party JMS provider client, a third-party JNDI provider, or custom JDBC drivers for WmDB, place the client libraries in the custom directory. Review the documentation for your third-party application to determine an exact list of required jar files.