These attributes are still needed. If you really can't add them the tree's schema hasn't been extended properly. You've mentioned the "old OES2011 servers", so i'd guess those reside a tree different from the one you're having issues with.
Anyway, i'd check the tree's schema and, if it's not extended properly yet, i'd do so manually or with the "schema-tool" in yast. Afterwards you can link the objects, manually or with the "OES Install and Configuration" workflow in yast.