A new sign-in experience to logon to Microsoft cloud services (Azure / Office 365) is being rolled out.
The next time you will logon to Microsoft cloud services you may notice this notification on the top right
If you click on the Try it now link you will then get the new login experience
or if you already had some credentials
If you have set a custom sign in page picture, it will show in full in the background
You can still go back to the ‘old’/current login experience by hitting the Go back to the old one link available on the bottom right side