In the classic Outlook I can add Inbox folders of shared mailboxes to Favorites, easily detecting and accessing new emails sent to any of mailboxes I manage. In the new Monarch Outlook, this is no l...
Please refer to this thread...
https://answers.microsoft.com/en-us/outlook_com/forum/outlk_win-outtop_classic-outsub_ofb/add-folder-from-a-shared-mailbox-to-favorites/e97f2919-3816-40c9-897c-4dc61087ce73?messageId=9c1ef73e-8f2f-4db5-946a-9b4a141e3a00&page=1