AD DS Troubleshooting

Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016, Windows Server 2012 R2

This section includes troubleshooting recommendations and procedures for diagnosing and fixing problems that may occur during Active Directory replication. It focuses on how to respond to Directory Service event log entries and how to interpret messages that tools such as Repadmin.exe and Dcdiag.exe might report.

Repadmin.exe and Dcdiag.exe are available on all domain controllers that run Windows Server 2012 R2 or later versions. For more information about how to use these tools to troubleshoot problems, see the following articles.

Another useful technology is Event Tracing for Windows (ETW). You can use ETW to troubleshoot LDAP communications among the domain controllers. For more information, see Using ETW to troubleshoot LDAP connections.

You can also install Remote Server Administration Tools (RSAT) on a member server that is running Windows 10. For information about how to install RSAT, see Remote Server Administration Tools.