@Hogne1260 Hi there, this is a few months old. Did you ever find a solution? I am attempting something very similar in SharePoint online with subfolders, each having different custom metadata columns. There is little to no information on how to do this, not to mention the constantly changing admin tools and menus make it difficult to find proper instructions in the first place. It almost seems as if we should create a separate document library for every "folder," which seems like a management and navigation nightmare.