Microsoft Sudoku has once again lost my progress on daily challenges. Please advise when this issue will be fixed and my progress will be restored.

You can save the game as a guest. The problem that your X box ID don´t give you access to your former Sudoku is still not solved. I can only play Sudoku as a guest.

I confirm this method works :D it's a bit complicated but at last it saves progress

When the problem first occurred on my Windows 11 box I tried the original suggested fix (clearing the cache) and it did not work for me. At the suggestion of my coder hubby I set up my old Windows 10 box and surprise, the game worked fine, saved daily and I had no problems. When I got tired of having to work with both computers to complete the daily challenges of the multiple games I play I tried the original solution on my Windows 11 and this time it worked so I had been up and running ok. Then last week the game stopped working again. It looked normal at login (like it was connected just fine), but upon completion of a puzzle it didn't save, acted like the puzzle had not been worked and didn't save anything to the cloud. After several days of waiting to see if it resolved on its own I pulled out the 10 box again and once again it is working fine in 10. Conclusion, an 11 problem. Given that 9% of the gaming division coders were laid off in the January Microsoft purge I doubt this a priority of anyone and I will just continue pulling out my old workhorse 10 box so I don't ruin my history of completion. I continue to think it is weird that this problem is only occurring with one game. Anyway, I'll periodically check in to see if status has changed but I won't be frustrating myself trying complicated procedures that only seem to work sporadically or for a short period of time. Good luck to all, hope there id eventually some resolution.

OK Moonrich

Not very optimistic approach from MS then.

And the worst is that it might never change.