How to Enable Dark Mode in Outlook App on Android?br br Note: Update your outlook App, If you have not updated it.br br Step 1: Open Outlook App. br br Step 2: Tap on 'Three Horizontal Bars' at the top left. br br Step 3: Tap on 'Gear' icon at the bottom left.br br Step 4: Scroll down to 'Preferences' section, and then Tap on 'Theme' under that.br br Step 5: Tap on 'Dark' at the Pop Up.br br It's done.