Changes to Steps for Login with SSO Setup

We utilize federated IDs and SSO through Azure with our Adobe services. Over the last year, users in our organization without Adobe Sign accounts were able to simply put their email into the username box and be redirected to SSO portal without any extra steps when requested to sign an internal document.

However approximatly around the start of the new year, these same users can no longer follow these steps. Instead they're being directed to click the "Adobe ID" prompt to then enter their email and be redirected.

Has any one else noticed this change or happen to know if there is a setting that has caused this?