We've recently migrated to Office 365 and are encouraging users to primarily use OWA for accessing mail because they have E1 licenses so they aren't entitled to the desktop apps.
The issue they are experiencing is that the unread mail count isn't increasing and as such not notifying them when a new email comes in.
These have to remain shared mailboxes because it's generic accounts like "sales@" which are monitored by 5 people so I can't do any forwarding.
Any Googling I've done has come back to Outlook 2013 answers but that's not what I need.
I'm also fairly certain you can't add a shared mailbox to favourites in OWA so if anyone has a way around this that would be appreciated.