- Sign in to dropbox.com.
- Click Files.
- Click Sharing.
- Scroll to the Folders in your Dropbox section.
- Find the folder in the list. Click ... (ellipsis icon), then select Folder settings.
- Under Management: Who can manage access to this folder? choose Only owners.
From your desktop
On some computers you can control who can invite people to a shared folder from the Dropbox desktop app. If you haven't already, download the desktop app.