Xbox network connection glitch on modern warfare ll

So far I only have cod Modern Warfare ll and Warzone 2 along with vanguard on my Xbox one console. I tried Modern Warfare ll and vanguard to try to play multiplayer online, yet the same error occurs too. I get the same error for the rest of my games too, except Warzone 2 since it doesn’t require game pass ultimate or Xbox live gold.

Hi and thanks for reaching Microsoft Xbox gamer's community.
My name is Josef.
I'm an Independent Advisor

Hope you're doing great today despite this Cardin

Additional information is needed, please tell me:

What console do you have?
Is this happening only with this game or if you try a different game something similar happens?
Just to confirm, Xbox live gold appears active in your account?
https://account.microsoft.com/profile

If yes, did you tried connecting your console to a completely different Wi-Fi network to see if the issue persist?
For this purpose you can share mobile data via Wi-Fi hotspot

And, double check if all your privacy and online safety settings are enabled here
https://account.xbox.com/Settings

Hi Cardin, and just to confirm.
If you try a completely different game (not a COD) the same happens?
Or it’s basically COD games?

Hi Cardin , let’s try this instead

A. If maybe you’re using an insider build in your console leave the program and go back to an stable Xbox OS version

B. It may not be directly related but try using a custom DNS address:
go to Settings > Network > Advanced Settings

Once you’re inside the Advanced Settings menu, go to DNS settings and select Manual from the list of available options.
When you get to the next screen, enter 8.8.8.8 in the box associated with the Primary DNS and 8.8.4.4 in the Secondary DNS box.

Once the default DNS addresses have been changed, restart your console and see if the issue has been resolved at the next console startup.
If that doesn't work use 1.1.1.1 as primary and 1.0.0.1 as secondary

C. Clear your MAC address
Go to Settings > Network > Advanced Settings > Alternate MAC Address
Select Clear, restart your console and give it a new try

D. If you maybe have the game installed on a external drive, move the game to the internal storage and try again

E. Reinstall the game

F. Do a factory reset for your console but keeping games and apps
Go to Settings > System > Console info > reset and then select keep my games and apps
**Make sure to know the email and password for all your accounts

I tried reinstalling the whole game I even tried to use custom DNS settings as mentioned before and restarted my Xbox one console after that, but the problem is still persisting. I don’t think it’s a good idea for me to reset my console to factory sweeting’s because I don’t memorize the passwords and accounts that share Xbox live with my associated account. I checked Xbox live status and support too, but I couldn’t find any similar problem that is associated with a bug that’s prompting me to purchase Xbox live gold or game pass ultimate along with not letting me play online multiplayer games