...........how do I find it again as it is not listed in My Activity or notifications?
Hello Stuart, I have confirmed that comments are currently not individually included in an Activity Stream. Instead, they are shown as part of the content itself (the blog post). So, if the blog post itself is in the activity stream, the comment should show. See my previous post for other thoughts.
Regards,
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.