Hi,
If you configured the outlook in cached mode, please check the following setting
- Click File -> Account Settings.
- Double-click user account, click more settings.
- Under advanced tab, check the box Download Public Folder Favorites
By default, Public Folder Favorites are not downloaded. Just like with shared folders, downloading Public Folder Favorites increases the size of users' .ost files. Also, synchronizing Public Folder Favorites might cause additional network traffic that could be annoying for users who have slow connections.
If this doesnt work, switch to online mode to take a test.
Best Regards.