You can follow below steps to configure dropbox backup in Plesk:
- Login to Plesk.
- On the left panel you will find option “Extension”, click on it.
- Search “Dropbox Backup” from search bar and then click on Dropbox backup.
- Click on “Remote storage settings”.
- Select Dropbox backup and sign in into account.
- Allow it by clicking on “Allow” button and click on manual verification link.
- Now you are authorized to access the Plesk data.