In outlook you can usually cut/paste but OWA it will fail and load a blank image. There is no image insert either.
Here’s how to do it:
- Upload the image you want to use to your website, like www.example.com/logo.jpg
- In OWA, make a new email and copy that image from a browser. Paste it into the email.
- Before sending, copy the image again. Then go into Options and paste it into your signature. It should remain as an image.
- Save and any new mail sent should have that image.