In order to see E-Mail folders shared by other users, you have to subscribe to those folders. You are automatically subscribed to your personal E-Mail folders. To hide a personal E-Mail folder, you have to cancel the subscription.
How to subscribe to personal or shared E-Mail folders:
Click theicon on the right side of the menu bar. Click on .
Click onin the side bar.
Click onin the display area.
In the Subscribe IMAP folders window activate the checkboxes of the folders that you want to subscribe to. Click on .
Parent topic: Sharing Data