I started halo 5 a few days ago, I can only find a match fast and play matches when a friend of mine invite me to his fireteam. But when I go solo and play alone I can’t even find a match or play a match in multilayer. Can anyone help?
Having the same problem if you sign in with a different tag you will probably find a game no probs.i have2 tags and one cannot find a game at all the other finds in seconds.if you get a resolve let me know please 
Hey I solved it, during ur matchmaking Arena. I changed my search preference to balance instead of focused and others. That’s one way to solve it or it can be ur WiFi connection