We are starting to work with Marketo custom objects, and we'd like to set up a many-to-many structure.
We have three objects: Subscription Info, Primary Product Usage, Secondary Product Usage.
We've been successful in linking the Subscription Info object to the Primary Product Usage object. We'd also like to link the Secondary Product Usage object to the Subscription Info object as well; however, the Subscription Info object no longer appears in the dropdown menu when selecting the link object on the Secondary Product Usage object.
From Grégoire Michel's response here it seems like this is something we should be able to accomplish, but we're having difficulty figuring out what we're not doing right and the product docs haven't been much help.
Any advice would be super appreciated!