Re: The latest version on Windows Phone 10...
The latest Android and iOS versions don't require a password. From the Microsoft blog post:
'Here in the identity division at Microsoft, we don’t like passwords any more than you do! So we’ve been hard at work creating a modern way to sign in that doesn’t require upper and lowercase letters, numbers, a special character, and your favorite emoji. And after a soft launch last month, we’re excited to announce the GA our newest sign-in feature: phone sign-in for Microsoft accounts!
With phone sign-in, we’re shifting the security burden from your memory to your device. Just add your account to the Android or iOS Microsoft Authenticator app, then enter your username as usual when signing in somewhere new. Instead of entering your password, you’ll get a notification on your phone. Unlock your phone, tap “Approve”, and you’re in.'