Hi @Colleen Carol ,
You want to create a workflow through SharePoint Designer to automatically create email templates. Then you want to insert the html template into the email body, but I don't know how to do it, right?
If my understanding is correct, I have some details to confirm with you:
- Are you using SharePoint server or SharePoint online?
- Please provide more information about the html template you are using.
I found some information and hope it can help you:
https://www.kalmstrom.com/Tips/SharePoint-Workflows/WF-E-mail-Formatting.htm
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