Open a new email or reply in Outlook
Place the cursor where you want the emoji
Press Windows key + .
Select an emoji from the panel
Close the panel and continue typing
On Mac, press Control + Command + Space
Select an emoji from the Character Viewer
In Outlook on the web, open the emoji picker from the toolbar if available
Copy an emoji from another source and paste it into the message
Use the Insert Symbol option if your Outlook version supports it