Hi! We have a client that uploads TWBX files onto their Sharepoint site. Firefox and Chrome open them up just fine in the Tableau Reader; however, in IE 10, it converts it to a Zip file, and then they have to download it and open it up as such.
The client wants IE10 to open the TWBX files like it does in the other browsers.
A .twbx is really just a .zip file with a different extension that Tableau recognizes. Unless you set the MIME type (as mentioned in the separate article), the web server may inspect the file contents and make the correct assumption that it's just a .zip.