Solved! Go to Solution.
This tutorial was put together to automate the publishing of a TDE directly from an Alteryx workflow.
https://www.interworks.com/blog/asuarez/2015/04/28/how-automate-tableau-data-source-refresh-alteryx
Hope this helps!
I believe Alex's (and Interwoks tutorial) is the way to go. Remember that Tableau changed the authentication process since 9.X.
I covered the topic of uploading from Alteryx to Tableau here:
Know that since then, Alteryx delivers a new macro to publish to Tableau Server if you run Alteryx 10.1 and higher:
https://gallery.alteryx.com/#!app/Publish-to-Tableau-Server--Installer-/565b9ed8aa690a1254265b9c
I hope that helps,
Frederic