The April feature update of Outlook for Office 365 (Monthly Channel) is now available.
In Version 1904, the most prominent change is that the Office Apps got their new icons;
Additionally, there are new Privacy controls for diagnostic data and connected experiences.
Outlook has been running a little thin on some real new end-user features and improvements the last few months, but there are some interesting ones scheduled for next month, so stay tuned for those!
Note: Depending on your installation type, this update can be installed via the Microsoft Store or the Update Now button in Outlook itself and updates Outlook to: Version 1904 (Build 11601.20144).