In recent times it’s been mostly PlayStation Network that has gone down, but it looks like it’s Xbox Live’s turn to kick users out across the board.
As of 9:49am AEDT, the Xbox Live services have been down including being able to sign into Xbox Live, play games online, buying items and downloading items that you have purchased.
Hey everyone! We're aware that some of you are having trouble signing into Xbox Live – the right teams are hard at work to get everything working again. Thanks so much for all your patience!
— Xbox Support (@XboxSupport) March 1, 2018
Aussie Outages has 1400 reports in the last hour of people being unable to access Xbox Live.