Hello, I'm attempting to assist a user with an issue I've not seen before. She relies on the Dropbox Outlook Integration app (Dropbox for Outlook (microsoft.com)) I cannot find any configuration options for it, I assume it needs to know which Dropbox account it needs to connect to, but cant find where this is set. All I've been able to try is removing / re-adding the app.
When opening an email with an attachment and clicking on "Save attachments" it works and the Dropbox contents are displayed:

(File names removed for privacy)
However, when composing a new email and clicking "Share Files" the Dropbox pane is empty, nothing comes up:
