Can't join friends on xbox one

I can not join my friends nor can they join each others game. I looked in the forum for a similar instant but nothing but something in March26.
It’s August 24 anyone else having this issue and if so is there a work around . We had no issues joining each other before, but now we can no longer play together .

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I have this same issue, tried alllll the troubleshooting steps that anyone has suggested. Here is a link to another post of xbox multiplayer. Multiplayer can't connect