First Dark Mode in the reading pane hit the Outlook Web app and Outlook UWP app, and today we are happy to report that the feature has also come to the desktop Outlook app.

Now available in Office 365/Office 2019, a pop-up notes that:

“In Black Theme you can now read your messages with a dark background.”

Users will be able to switch back and forward with the Sun and Moon button as in the UWP app.

Via Florian B on Twitter