See screenshot below where I isolated one recently sent message. What weird is that sent items are in the.
Of course, I've confirmed that the "Do not save copies of sent items" box in More settings.Internet email settings is unchecked. However, Outlook shows no sent messages in the \Sent The inbox, inbox subfolders, drafts and trash all sync with no issues - send and receive work fine. Outlook 2016 is newly set up (on a new laptop) with an imap connection to an existing Gmail account.