Microsoft started testing password-free sign-in for Windows 10

Microsoft Windows 10 Insider Preview Build 18936 Reveals General Changes, Improvements, and Modifications for PC.
Microsoft has begun testing password-less sign-ins on accounts, moving closer to the goal of improving security using modern authentication technology. The feature was recently released on Windows Insider in the latest Windows 10 Insider Preview Build 18936 (20H1) Fast Ring, users who have initial access to test the build and respond to it. In addition to the passwordless sign-in feature, the build also adds functionality to your phone app on more Surface devices, quicker events from the taskbar, general changes, improvements and system improvements.
Sign in without a password to the Microsoft account on the device
If you have signed up for the Microsoft Insider program but the latest build is running, you can enable passwordless sign-in for Microsoft accounts on your Windows 10 device by going to Settings> Accounts> Sign-in Options and setting the toggle to ‘. Turn on under ‘Password your device’. Enabling passwordless sign-in will switch all Microsoft accounts on your Windows 10 device to authenticate via Windows Hello Face, Fingerprint, or PIN. If you haven’t set up Windows Hello yet, Microsoft has confirmed that you’ll get a walk-through to set it up at your next sign-in.
Your phone app: Phone screen on more Surface devices
With the latest driver update to Windows Insider Rings (Marvell 15.68.17013.110), Microsoft has expanded the availability of its phone screen features to the following Surface devices: Surface Laptop, Surface Laptop 2, Surface Pro 4, Surface Pro 6, Surface Pro 6, Surface Pro 6, Surface Book 2.
Create a quick event from the taskbar
Microsoft is making it easier to create events and reminders by introducing additional functionality by providing a dedicated space just below the calendar for typing notes. As you can see in the pictures below, you can choose the desired date and start typing.
Like other builds that were released early in the development cycle, the latter may have bugs. If you decide to proceed with the installation of this build, you will not be able to switch slow or release preview rings without a clean-install on the machine you flashed with the quick ring build. If you want to stay in 19H1, change your ring settings via * Settings> Updates & Security> Windows Insider Program before installing the build.