Outlook 2016 Add-in that creates an html signature doesn't embed images(logos). How can I do this ?

Jul 4, 2017
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Hi All,

I have created an Outlook Add-in that allows users to manipulate their signature following the company rules.

The problem I am facing is embedding images(company logos).

I have tried base64 encoding and using <img>. The html signature is correctly written and saved. I have verified it.
But somehow when I want to send a mail the base64 content (saw it in source view) is partially cut of, it is missing a part.

I have also tried to use "file:///" and hope that outlook will convert it to cid and embed it but that doesn't work.

How can I embed images in a html signature that I create with my Add-in ?



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