How do I troubleshoot Active Directory password synchronization issues?

1. Confirm the Active Directory account credentials used for connecting the resource to the directory.
2. Check for version compatibility between the resource and the directory.
3. Verify that the synchronization process works between a staging server and the directory.
4. Check that users are mapped to the correct directory.
5. Review synchronization logs to detect any anomalies.
6. Investigate any issues with the directory access.
7. Confirm user permissions on the resource.
8. Check that user identities are published from the directory.