Microsoft could be set to shut down its Games for Windows Live service, according to a now-deleted update on the Age of Empires Online support page.
Games for Windows Live will be discontinued on July 1, 2014. Although it is available through Steam, Age of Empires Online requires features of the Games for Windows Live service. You can continue to enjoy all the features of Age of Empires Online as the service will remain 100 per cent operational until July 1, 2014, when the server will shut down.
That update has now been removed from the support page.
Just days ago, Microsoft said it would be shutting the Xbox.com PC Marketplace on 22 August. At the time, Microsoft stated that "the Games for Windows Live service will continue to operate as usual", just without the "purchase functionality".
We're awaiting further information from Microsoft, and will update if any official comment about the future of Games for Windows Live become available.