I am getting error code 0x83860012 when trying to sync my games to play online.

Hello Cap T, My name is David. I am an independent advisor, happy to help you today.

1. To start, we can try restarting your console: A simple restart can often resolve temporary glitches. Try turning off your Xbox One S completely, including unplugging it from the power source, waiting for a few minutes, and then plugging it back in and turning it on. Once it's powered back on, attempt to sync your games again.

2. If the above doesn't work, we can try clear persistent storage: Clearing the persistent storage on your Xbox One S can sometimes help resolve syncing issues. Here's how to do it:

a. Press the Xbox button on your controller to open the guide.
b. Go to "Settings" > "System" > "Storage".
c. Highlight the "Reserved space" option.
d. Press the "Menu" button on your controller (three horizontal lines).
e. Select "Clear reserved space" and confirm the action.

3. Check your network connection: While you mentioned that your network settings are good, it's worth double-checking your network connection to ensure there are no issues. Make sure your Xbox One S is connected to the internet and that your network is functioning properly. You can also try connecting your console directly to the router via an Ethernet cable to see if that resolves the syncing problem.

4. If none of the above steps work, you can consider performing a factory reset on your Xbox One S. Keep in mind that this will erase all data and settings on the console, so consider backing up any important information before proceeding. To perform a factory reset, go to "Settings" > "System" > "Console info" > "Reset console" > "Reset and remove everything". Follow the on-screen prompts to complete the process.

I hope this helps.
Best regards.

Unfortunately no luck in this method,

I get error code (0x83860012)

I’m getting the 0x83860012 code

I am still getting an error code 104 when trying to play Microsoft Solitaire games.

I get the same error code when I try to refresh. Its some kind of syncing error. Sometimes when I open the game it says it can't connect to Xbox Live.