Shared mailboxes not showing all emails

There is a default setting that stops all emails in a shared mailbox from showing, this article shows the steps to update the setting know to resolve this issue.

Shared mailboxes not showing all emails:

 

This is caused by a default setting that caches shared folders. To resolve this and see all emails in a shared mailbox, disable the caching of all shared folders in Outlook 2010 and later versions. To complete that, please follow these steps:

1. On the File tab, click Account Settings in the Account Settings list.
   
    
2. In the Account Settings dialog box, in the Email tab double-click your Microsoft Exchange Server account.
   
3. In the Change Account dialog box, click More Settings.
4. In the Microsoft Exchange dialog box, click the Advanced tab.
5. Uncheck the "Download shared folders" check box
   
    
6. Click OK two times.
7. Click Next, click Finish, and then click Close.
8. Restart Outlook.