When I open OneDrive, OneNote or other Microsoft software, I press the Log In button and it displays a form with a field to enter ONLY email. When I press Next, I land on a standard login form with email field completed. Why not display the login form directly when I land to onedrive.com?
Here are some screenshots of this behavior:
First step when I press login:
And then the login form after entering email:
This seems so strange; can somebody explain this flow?