I have xbox live gold but cant play modern warfare online

There are Two Xbox ones on my network and only one can access Xbox live servers for Modern Warfare at once. One will get on just fine then the other one will keep failing to connect to Xbox live servers until the other console gets off. What can
be done for this?

Do you 2 copies of Modern Warfare and a separate gold account for each console?

We have two Xbox's and we play fine online and with Modern Warfare.

Warzone is it's own separate thing, In order to play the MW campaign you will need to own the full Modern Warfare game and need Xbox live Gold to play online

Modern Warfare III is not a free game, it’s a paid one.
At the moment, Warzone and Modern Warfare III are different games, and every online mode on Modern Warfare III requires a Game Pass Core subscription. (Live Gold)

Hi I have Xbox live and just started playing call of duty Warzone again and I wanted to play modern warfare but whenever I try to load in it makes me either buy Xbox gold or game pass I don’t understand because before I used to play modern warfare I never had gold or a game pass

https://support.activision.com/modern-warfare/articles/known-issues-in-call-of-duty-modern-warfare

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