Reset MSOL_ user Password

1. Start the Synchronization Service Manager (START ? Synchronization Service).
   
2. Go to the Connectors tab.
3. Select the AD Connector that corresponds to the AD DS connector account for which its password was changed.
4. Under Actions, select Properties.
5. In the pop-up dialog, select Connect to Active Directory Forest:
6. Enter the new password of the AD DS connector account in the Password textbox.
7. Click OK to save the new password and close the pop-up dialog.
8. Restart the Microsoft Entra ID Sync service under Windows Service Control Manager. This is to ensure that any reference to the old password is removed from the memory cache.
9. Run Sync Service to make sure all sucessful