Image in Email Body for Nintex Workflow for Office 365
Insert Image in Email Body for "Send An Email" action in Nintex Workflow for Office 365.
To be able to use an image in the email body for both Internal and External email services, the image has to be publicly accessible that does not require any credentials.
An image stored under SharePoint Online tenancy or other media that required credentials to access cannot be used and it will only send either a blank email body or a symbol X as a replacement of the image that cannot be found.
As a workaround, use the functionality of the email service "External email and attachments" and attach the image to the email rather than add the image in the email body.