Desktop Outlook Stopped showing some HTML emails correctly beginning around November 1st, 2018. It strips the CSS from the email and attaches it as ATT00001.css
This means that emails that formerly rendered well with an HTML body are now difficult to read. We have certainly made no changes to the HTML documents that are attached to the emails. The HTML documents are generated by Nunit, specifically nunit2report, which we have not touched in more than 5 years.
Is there an option we can control to get the HTML emails in desktop Outlook (on Windows) to render as they did last week?