I can't sign into my account for my Xbox on any other device it says I had too many failed...

what a joke. I cant even sign in using my account I had the last few years. When I try and sign it, on any device, it says "sign in and registration is unavailable". What gives??

This is happening to me now too. None of my Xbox-enabled games are able to log on. For an unrelated reason (Surface 2 LTE) I reset my device to factory defaults and let all my apps reinstall after signing back in. I then try to use any xbox apps and see
that I can't sign in. On my games app I am signed in and in the App store. I uninstalled then reinstalled many apps and still no solution. I can sign in on my phone no problem. What would the issue be?

I'm having a problem with Vampyr too. Won't install, says I don't have any devices attached to my Microsoft account. Only issue is my PC IS connected to my account, and every other game will install. Only Vampyr says this and my PC shows correctly when
I browse attached devices. Annoying.

I created a new Microsoft account, and then bought the game for that account. I tried to change to a different local admin in my PC, but I was still unable to change the PIN, as it says that I can't set one up unless my email is associated with an organisation. I am able to log into the account on another PC, but still unable to on my PC unless I have the PIN. I've now guessed the PIN incorrectly too many times, and says that I can't try again unless I restart my device. I tried to restart my device, but says the same thing still without having tried yet.

Slightly different problem with me. I set up a MSFT & Xbox account for my son. I can play online and join battle mode games under my account, but if we sign-in as his, it says connection failed. My understanding is that Live Gold should apply to anyone
playing on that device, right?

If it is a parental setting, any idea what I need to check?