The option to Sign In using our enterprise portal is not available in some instances.
Trying to work through the ArcGIS for Excel Basics training tutorial.
When I try and sign in I only get the options of ArcGIS login or ArcGIS org url. I want to use our ENT portal url.

In the past I was able to work around this (when we had the odd la.arcgis error), by opening an empty excel document, signing in to our ENT portal and then opening the data file I needed.
Currently when I try this it pops up the standard ArcGIS log in (above).
I am able to open an empty document and sign in through our ENT portal, but as soon as I try to open the training file it wants me to sign in using the windows above.
