Dropbox recently removed External Collaborators tab from Admin Console > Members menu. This was a fast and easy dashboard to see all external collaborators and each shared resource they have access to. Reached out to support and now only option to review external collaborators seems to be through the clunky Admin Console > Security > External Sharing menu. The old External Collaborators tab in the Members menu provided much better security auditing for team admins. Please bring the original External Collaborators dashboard back to the Members menu.