Outlook for Office 365 (Monthly Channel) got a new feature on the last day of January which many have waited for a long time;
- Animated GIFs
They’ll see what you meme: When text or static images just won’t do, use an animated GIF to make your point. Learn more
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 1901 (Build 11231.20130).