I am using ArcGIS Pro (basic license) to create a point feature class of project locations and information. I also have a client contact list that I would like to relate to the projects. This would be a many to many relationship as some projects have more than one client and some clients are associated with more than one project.. Unfortunately, since I am working with a basic license, I can't set up relationship classes (or so I assume, so if I'm wrong on this let me know). and doing a relate won't really help me since, as far as I know, the relate won't carry over to ArcGIS online.
What I would like to be able to ultimately do in a web app, is to click on a project location and be able to see the client and client contact info without searching for it in a separate table. Is there any way to do this without having to set up relationship classes? Maybe there's some widget or tool that i could use to link over to a table or something? any ideas? I don't think doing a join would work since we're talking about a many to many relationship.