I’ve been getting this error for the past half hour whenever I try entering multiplayer it gives me the error “Unable to connect to Halo 5: Guardians Lobby Services” and it kicks me back to the main menu. My connection is fine and my NAT is open but I can’t play Halo 5 right now because of this error.
I have the same problem. Wtf is going on
Yes same here was playing Warzone Turbo and it did the same thing
Oh thank goodness I’m not the only one.
Okay i got a solution. Disconnect internet cable from xbox, enter the game without internet connection, when you are in the game connect LAN cable back and you should be able to connect to lobby service
no its come back on now
I believe there was a short Xbox Live outage a short while ago. 343 were looking into the issues, but as far as I can tell it wasn’t on their end
Is it working for anyone else at the moment? Because for me it’s still not working, literally have tried every solution! 
IDK either, I have a night all by myself and I wanna play some Halo 5 but I cant because of this glitch. I’ve tried EVERYTHING, wont work