I have recently gotten a Xbox 360 and when I put in my email and password, the console displays this message:
"Sorry, there's a problem with the credentials that you're using to sign in. Go to https://account.live.com to fix the problem."
"801540A9"
I looked this code up and i found this thread with my exact problem:
But, in the answers it says to
go to Security tab > Click on "More security options" > Go down to "App Passwords" > Then choose "Create a New Password" > Finally, plug it into the password section of your log-in.
The only problem with this is when I go to more security options, there is no App passwords tab.