It is well known that if you've forgotten your Microsoft Account password at the Windows login screen, you're prompted to reset it from the web using another PC. Well, it turns out that starting in the Windows 10 Fall Creators Update you will be able to recover your Microsoft account password directly from the lock screen, without the need for a secondary Windows 10 device (via WindowsArea.de)
Though the feature was not documented in any changelogs, it being tested now with Windows Insiders and was first spotted in Windows 10 build 16237. To access it, all you need to do is click on the "I forgot my password" link on the login screen. A popup will appear and you will then be prompted to verify your humanity and identity. Just like during the initial Windows 10 setup process, Cortana will appear and will help guide you through the reset process. If all goes well, a verification code will be sent to your phone number, and you will be able to enter the code and reset your Microsoft Account password directly from your PC.
If it comes down to it, you'll also be able to reset your PIN using the same process from the lock screen. However, with the PIN reset, you will need to verify your Microsoft account. Safe to say the feature will bring extra peace of mind for those who aren't that good with passwords.