Hi Dani --
I detailed what happens in my initial post. I launched Moodle Desktop on my app. I enter the URL for our Moodle site. This opens our SSO login page (in an embedded browser) where I enter my credentials. I enter my credentials on our SSO login page, and it returns this error: "The username you entered cannot be identified." I entered the correct username and password. I've attached the error I see on our SSO login page.
I hope this helps. Thanks... Brian