Can I load mixed content Http and Https for Office 365 outlook addin?

Question

As per below link,security for Office Add-ins and what I understood that we need to apply SSL for Add-in and XYZ WEBAPP which we are expecting to get loaded inside the office 365 add-in task pane.

But, do next level WEBAPI calls also need to be secured (Https) which needed for XYZ application?

Answer 1

The answer is yes, per documentation you refer to ... "Data communicated with the web server that hosts a content, Outlook or task pane add-in as well as communication between the add-in and any web services it uses must be encrypted using the Secure Socket Layer (SSL) protocol."