I don’t know what’s going on but I’ll try to do a slayer match and I even tried ffa but I keep getting dedicated server error message.
Me too
Same, i keep trying to do ffa but it keeps saying 3/4 and then it gives me an error message
I am getting the same issue in Team Arena
> 2535427240092988;3:
> Same, i keep trying to do ffa but it keeps saying 3/4 and then it gives me an error message
Glad I’m not the only one.
> 2535427240092988;3:
> Same, i keep trying to do ffa but it keeps saying 3/4 and then it gives me an error message
Exact same for me and my friend. 
> 2533274792540112;4:
> I am getting the same issue in Team Arena
343 has been DDos or someone messed something up on their servers. Lol
Yes, major issues now. I can’t even get to the lobby.
Xbox Live Service Status says “Games” are green but all the Apps are red.
Microsoft Azure (i.e., where Halo5 servers are located) status shows all green.
No idea what’s going on technically, but in street slang it’s “broke.”
i reset every thing on my end, game, console, and router. servers are still giving error. i was realy looking forword to playing tonight.
Servers are down, yup. Its now saying there’s a problem with the Xboc live service. And here I thought I’d get to grind my million req points. sigh
I think xbox live is having issues.
Xbox Live Service is now reporting that the Social and Gaming “services” are having issues. However, I don’t think everyone is impacted. My friend down the street is having zero problems and playing his butt off while at my place I can’t even connect to the lobby.
Try going into the console settings and checking for a manual update. I’m applying the update now but it appears to have fixed the issue for others
XBL were having issues earlier that affected a few games, should be resolved now
https://www.halowaypoint.com/en-us/forums/6e35355aecdf4fd0acdaee3cc4156fd4/topics/343-response-servers-are-down/2da7527c-9eaa-457a-b511-99a8441aa62e/posts?page=1#post17