In Box it is not very easy to see what foders are shared externally. There are small globe icons on the collaborators, but if that list is too long, the external collaborator might not show up.
Apart from that: the list of collaborators is not visible in Box Drive.
Box should introduce a new Folder type (different color, different icon) to show that information in this folder is shared with external collaborators. This functionality should be available across all clients (Web, Drive, Mobile).
Lia Steinhardt-Keely commented
Agreed - I would also like to see a setting in the admin panel that allows us to set a select group of accounts as service accounts and thusly have folders that are owned by the service account but co-owned by only one individual (i.e. a personal folder) show either as a manila / unshared folder OR an alternate color that is specific to folders that only have two collaborators: a service account and an end-user.