An xbox one cryptonight miner is actively under development by therealcrypt for the altcoin Turtle Coin. It's in alpha, so not publicly released as of yet.
It is working with native CPU mining, currently around 100 h/s (hasn't been fully optimized yet, and running in low power mode).
Once GPU mining is working, the total hash rate is estimated to be around 900 H/s.
Apparently it doesn't matter which xbox one version is being used (xbox one, xbox one s, or xbox one x), they will all get the same hash rate since teraflops doesn't compute to mining & all versions have the same CPU and GPU.
If you have UWP or other M$ related dev skills, you might be able contribute to project, or at least get the latest status updates at the TurtleCoin discord channel @
https://discord.gg/cP7NcGwI've been buying up xbox one s at discounts, hope to have 10 of them running eventually

That's good news. Thanks for the heads up!
Btw, can you explain why both the OG/S and the X GPU have the same hashing performance?
OG XBOX ONE has a Radeon 7790 (200 H/s*), while XBOX ONE X has an RX 580 (800 H/s*). Surely they cannot have the same hashing performance?