If you are experiencing the Sync Failed error in Windows Store For Business in Configuration Manager as shown in below, kindly verify with the WsfbSyncWorker.log. Based on that you can resolve the error.
For an example you can refer the below scenario.
Step- Check the Log file and filter the error you are seeing, In my example it is about permission,
Step- Verify the Windows App store local folder has the enough write or not, Once it is confirmed, Re-Sync and verify
Step- Once the Sync Completed, you must visible your apps as below.