Outlook 2016 - cannot view contents in shared mailbox inbox folders, but visible from OWA

There is a shared mailbox. users connect to the mailbox by adding it as an additional mailbox. It works fine. All suddenly, users reported they are no longer able to view contents of Inbox folders. " we don;t have any thing to display"

Here is the fix:

The way to change this option is the following:
 - menu "File"

 - "Account settings" -> "account settings..."

 - in the "E-mail" tab, select your account and then push the Change... button

 - push the "More settings..." button

 - go to the "Advanced" tab

 - in the "Cached Exchange Mode Settings" section, untick "Download shared folders"

If this options are already check, you need to do the opposite way to enabled both "Cached Exchange Mode Settings  and Download shared folders" options.