I have been unable to get party chat to work on my Xbox One. My NAT settings report back Open and behind a cone NAT.
Meraki MX 60 firewall with port forwarding to Xbox
Motorola Surfboard Modem 6141
Single Xbox on network.
I have even tried connecting directly to the cable modem with a public IP on the Xbox with no luck. Network test all come back green and open but still can't chat with folks in party or in COD game chat.
Could there be an issue with the Xbox itself prevent chat? Any help or ideas would be appreciated.