Outlook 2016 has the issue that it doesn't show a notification when receiving a new email in a shared emailbox.
Popupsharedbox makes it possible that a shared mailbox of outlook, when receiving a new email message show a notification in the right bottom of the screen.
You can put them anywhere you like, extract the downloaded zip file
right click on popupsharedbox.vsto and choose "Open". The addin gets installed now.
Configuration
Goto: File -> Options -> Add-Ins
Then press "Add-in Options.." The option screen gets displayed:
In this screen you can add and remove shared mailboxes that you want to receive a notification from.
When done adding, restart outlook.
