Halo Wars 2 crossplay broken?

So when myself and my friend attempt to join each other (either windows to Xbox or visa versa) we both simultaneously get disconnected from the halo wars 2 online services, then reconnected 5 seconds later. is there a fix for this or have i persuaded him to buy a completely broken game?

This is a known issue with some of Microsoft’s services that cropped up about earlier. Both 343 and Xbox are aware and investigating, it should be fixed fairly soon
https://support.xbox.com/en-US/xbox-live-status