We have a dev wM 6.1 IS server currently configured to a Dev Broker on 6849. Can I make this IS a client to another Test Broker so that I can publish the documents there as that Broker is already connected to an another IS where I have triggers.
You can’t do it like this. The Proper way will be:
Create a gateway (Territory) between the two broker. Share the document. The document you want to publish from your Broker, should be there in Can publish type and in the other broker the document should be there in can subscribe. The both document should be in snyc.