You can use your web server to do this or a free hosting site like Imgur or TinyPic. To solve this problem, you need to host all email signature images online. So, if you try to manually add an image into your signature, a recipient is likely to see a blank square with a red “X” in it or they will find a separate attachment has been added to the email message. This is why you’ll find your Outlook signature template not appearing correctly and displaying images in a way you didn’t intend. The Office 365 disclaimer function doesn’t let you embed images like logos, social media or banners as it cannot recognize them as separate elements.

Images aren’t showing in my signature or appear as attachments.

This article covers the most common complaints that organizations have when it comes to their Office 365 signatures not working correctly and what the probable causes are. Office 365 is not designed to provide native email signature management, so it’s quite common to find a signature not showing up in Outlook when using Office 365, especially if HTML is involved.

We say this many times, but it is worth pointing out that the disclaimer function in Office 365 (now Microsoft 365) is actually meant for plain-text messages, not email signatures.

Outlook not ing all emails