Unfortunately, the Outlook App for Android does not support HTML email signatures. Please only use this guide if you’re planning to add a text-based email signature.
Open the Outlook App on your Android device. Tap the menu button from the top left.
Tap the settings gear icon on the bottom left of the menu.
When you’re in the settings menu, tap on the signature section.
Paste your new email signature into the text box provided and then tap the tick in the top right corner to save the signature..
Your email signature is now installed!