You know that Office 365 Groups have a mailbox and that the mailbox holds conversations and the group calendar. But many other folders exist in a group mailbox. Some are used for internal purposes, some by clients. And sometimes you want to look to see what those folders hold, as when some mail might have been misdirected to Junk Email.
Microsoft has released the Report Message add-in for Outlook 2016 to help Office 365 users report when spam arrives into Inboxes or messages are incorrectly treated as Junk. It’s a good way to get information about new threats to Microsoft security researchers.