“To date, we’ve juggled future-facing work and priorities with continued upkeep of Halo’s Xbox 360 legacy services.
However, 343 has since confirmed that it won’t be shut down completely until January 13th, 2022. The initial date for the server shut down is December 2021. 343 Industries recently revealed that the server for the vast majority of Xbox 360 Halo titles will be shut down.