Hello, me and my friends is trying to play halo MCC coop together online, but we always get “Your connection to the game session has failed, please try again.”, when trying to connect to each-other. I only have a 48 hours trial, so if you could help me within these 48 hours, i’d be really happy!
Hey OP, are both your NATs one your Xboxes set to to OPEN? You can find out how to check on this Xbox Support page, it also has some troubleshooting you can run through as well. As a possible quick fix, you could try hard resetting both of your consoles and then try connecting to each other after that - hold in the power button for about 30 seconds, unplug the power brick, wait 1 minute then connect back up and switch on. If either of you use wireless, you could also try switching to a wired connection if possible and see if that helps to stabalise things 
> 2533274813317074;2:
> Hey OP, are both your NATs one your Xboxes set to to OPEN? You can find out how to check on this Xbox Support page, it also has some troubleshooting you can run through as well. As a possible quick fix, you could try hard resetting both of your consoles and then try connecting to each other after that - hold in the power button for about 30 seconds, unplug the power brick, wait 1 minute then connect back up and switch on. If either of you use wireless, you could also try switching to a wired connection if possible and see if that helps to stabalise things 
Been there, done that. Turns out it’s a issue with the game, to make it work we simply restarted the game a few times
> 2533274824448695;3:
> > 2533274813317074;2:
> > Hey OP, are both your NATs one your Xboxes set to to OPEN? You can find out how to check on this Xbox Support page, it also has some troubleshooting you can run through as well. As a possible quick fix, you could try hard resetting both of your consoles and then try connecting to each other after that - hold in the power button for about 30 seconds, unplug the power brick, wait 1 minute then connect back up and switch on. If either of you use wireless, you could also try switching to a wired connection if possible and see if that helps to stabalise things 
>
>
> Been there, done that. Turns out it’s a issue with the game, to make it work we simply restarted the game a few times
Thanks for the update.