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.

Forget this17 Feb "solution" - after it, Sudoku was working fine until 17 March and then it once again just stopped saving any Daily Challenge acheivements.

I have tried the "solution" again, and all other recommendations (uninstall - reinstall / wsreset.exe / resetting Sudoku from 'Apps' / deleting Tokenbroker Account and cache files / running Store and App Troubleshooters / Install Xbox, and then using Xbox to install a fresh MS Sudoku download / etc etc

And throughout all this, MS Solitaire and Mahjong have remained working without a problem!

So I will now GIVE UP with MS SukDodu - I just do not want to waster any more time on it.

Exactly as I did with Minsweeper many years ago.

If Microsoft can't be bothered to fix it, I can't be bothered to play it.

Over and out

Sorry it did not work for you. Perhaps I should hav mentioned that this solution only worked after following earlier advice on this question which I repeat here:

Open the File Explorer and paste the following into the address bar to go to a specific location on your computer:

%userprofile%\AppData\Local\Packages\Microsoft.XboxIdentityProvider_8wekyb3d8bbwe\AC\TokenBroker

Delete any accounts and cache folders that you can see at this location.  

This restored my game progress history for the month to the point that I lost my scores. I have also unistalled any thing related to the Xbox app. This does not appear to impact any of the other MS games like Solitaire.

The message that I get after a wait reads something like RESTART REQUIRED as a banner followed by a message that the game has lost sync. There is a large button to press labelled RESTART. I have had the same message come up on my Android phone version of the game so it does not seem device specific. Good luck.

Sorry Ian, didn't work for me and i left the program running all night.

I take it the sync your referring to is Sync with other devices??

I don't have that added worry, just my PC. in my dinosaur world phones are for speech and texts only.

I have the same problem

By accident/chance I found a working solution to the 'not saving completed challenges puzzles'. This worked for me at least for two days now.

The trick is to complete one or more puzzles and then walk away leaving sudoku still connected. After some minutess or so the screen overlays the sudoku standby page with a message that there is a re-synchronisation problem and Sudoku will restart. The screen briefly goes black and then returns with the recent puzzles now saved. Not sure how this is working so will try googling using the term' synchronise and sudoku' and see what surfaces.

Whist waiting I also logged into my same Sudoku account on my laptop and mobile phone and had similar synchronisation messages. Need to do more experimenting to be sure of a definitive answer.