Endnote Online - sharing groups with duplicate references - where's the blue folder?

I have around 4000 references divided among several groups.  Some of the publications reside in several groups (i.e. Paper 1, 3 and 5).  I recently shared these groups with a colleague and *believed* that ones shared would show up with the little blue folder.  My colleague is missing the little blue folder in her “shared groups.”  Where did the little blue folder go?

In other means, is there a way to show which publications are in numerous different groups easily?  Yes I could just create another group with them but then that defeats the purpose of the grouping it in Paper 1, 3, and 5.  Or is this something we would need the desktop of Endnote for?

Thanks for your help in advance!

Presumably, the little blue folder is a smart/dynamic group on your desktop version.  Those are not shared with the online version of the libarary unfortunately.