It's not just you, Xbox Live sign-ins appear to be down for some

[Windows Central]

Xbox Live sign-ins are down as of writing, preventing some users from accessing their content on Xbox One and other platforms.
Nope, it's not just you. Xbox Live appears to be down for some users, preventing online sign-ins to Xbox One consoles and other services that require Xbox Live. The outage was reported earlier today, but recently the status has been updated to say "resolution pending," suggesting the problems will soon go away.

Full story from the WindowsCentral blog...