> My halo 5 p: Guardians online multiplayer does not work due to a profile and/or data syncing error which doesn’t allow me to go online. Anyone else who has this problem should talk to Microsoft support as it is probably a problem with your account or your console.
When I have this problem a hard reset usually works, hold dons the power button on your Xbox one for 10 seconds and reboot it. This normally solves it.
If this doesn’t work, try resetting your router or modem, just unplug it for 10 seconds.