How to subscribe to the Jira "sub-forum" without subscribing to the Confluence and SSO forum (https://software.xsede.org/discussion-forums/enterprise-services)?
Also, it is confusing that the Forum field allows us to choose a sub-forum but then gives an error:
Thank you for your feedback. It looks like JIRA was created as an organizational "container" instead of a functional "forum", so that's why you weren't able to subscribe to it. I've changed the Enterprise Services sub-containers to sub-forums so you should now be able to subscribe to them individually. That may also be why you received an error message when choosing a value for the Forum field when creating a new Forum topic, but the image from your post is broken so I can't see the error message. If you encounter an error again, please let me know.