The new Outlook works differently than the classic desktop version when it comes to signatures. Instead of saving them on your computer, signatures are now stored in the cloud and synced with your mailbox. This means you can't simply drop an HTML file into a local folder like you could before—any local changes will be overwritten when the sync happens. To get your HTML signature into the new Outlook or web version, you'll need to copy and paste the visual design directly into the signature editor.
Follow these simple instructions to add your email signature:
Click the Settings gear icon in the upper-right corner, and then navigate to Accounts > Signatures.
Click the New signature button.
Copy your signature from the preview example that is displayed after saving your signature. Paste it into the editor box in Outlook.
After pasting, review your signature as some elements (like images, fonts, or hyperlinks) may not copy correctly. Make any necessary adjustments, such as re-adding images or hyperlinks, or fixing spacing issues.
Optionally, set the newly added signature as default so it is added to all your emails automatically.
Click Save to add your new signature in the new Outlook or web version.
Your new email signature is now ready to use in the new Outlook and web version.
