Does anyone have an idea why Windows 10 apps ask you to log in, e.g. Mail, Calendar, News, when you are already logged in to Windows using your Microsoft (aka Live) account?
Here's the scenario: I log in to my PC using my Microsoft account, then every other app seems to need me to provide my username and password again.
This is especially annoying since I use 2-factor authentication, because that requires: username + password + numeric code. Even more so when you consider that the Win10 Mail app will fill up the notification center asking you to update your Mail login until you do.