3rd party servers for legacy xbox 360 Halo games affected by shutdown

Would it be possible to run 3rd party servers for the legacy Xbox 360 versions of the Halo games when the official servers are killed off in 2022?

I was wondering if this would be allowed by Microsoft/343 given they won’t be directly involved with those versions of the games and will allow dedicated players to continue playing after the sun sets officially?

That would require asset aquisition. Possible; highly unlikely.