Hi!
You can use the following scripts to help troubleshooting the password hash sync: https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/tshoot-connect-password-hash-synchronization#scripts-to-help-troubleshooting
However, you can disable and re-enable the feature as a first step:
- Run the Connect installation wizard.
- Select Customize synchronization options, and unselect password sync. This change temporarily disables the feature. T
- Then rerun the wizard and re-enable password sync.