Resolution:
In some situations, non-default transport might be needed when sending/receiving messages with Messaging microagent. Thus additional Messaging microagent is needed.

Additional Messaging microagents can be added by using the TIBCO Hawk plug-in microagent mechanism. To configure additional Messaging microagents:
1.  Copy the .hma file for the microagent to the plugin directory. The plugin directory is specified by the -hma_plugin_dir option in the hawkagent.cfg file. If using the Configuration Utility, the plugin directory is specified by the Plugin field in the Agent tab.
2.  Make sure the xml file specified in the hma file is present in the expected location.
3.  Re-start the TIBCO Hawk Agent.