XBox live connectin' is not workin'

Hi guys! It's about version of last 6 mounth. After X moment, I can't connect to my friend with XBox Live (he usin' win10 edition). And he can;t do it too! Cold u please help us with that problem. 

P.S. Sorry for my English...

P.S.S. Messege with invitin' just not pickup