Update: After a few semi-regular updates to the page to make sure people knew the team were working hard on the issue, it seems that Xbox Live is back up and running as of a couple hours ago.
The original post follows.
So it turns out it’s not just the PlayStation Network that can flake out and stop people having awesome fun times online, as Xbox Live is having a bit of trouble on Xbox One, namely an inability to sign in. Signing in is apparently quite important.
According to the Xbox Live Service Status page, this is apparently only affecting the Xbox One, the latest update to which came at 9:40 AM CST (15:40 PM GMT) and reads:
We know some of you are unable to sign in to Xbox Live, and we’re on it! Thanks for your patience while we work to correct this issue. Another update is coming your way in 30 minutes.
Since it’s Call of Duty season, and there are bound to be a fair few people eager to hop online and shoot some things across Europe, fingers crossed Microsoft can get Live back up and running shortly.
We’ll update this post when things start to get back to normal.
Source: Xbox Live Support