How to Troubleshoot and Fix Active Directory Replication Issues

Repadmin was introduced in Server 2003 and from Server 2008 Microsoft started to include it in. It is a command line tool to check the replication between domain controllers. It is a diagnostic tool to check the health of the Active Directory, also it can force replication and find out the errors. Active Directory replication is a important service which synchronize with other domain controllers in a forest. If there is problem with this replication process it can cause the issues related to network resources like applications, printer and files as well.

Below I will show you how you can go ahead step by step and find out the exact issue.

First you must open your command prompt with administrator privileges as shown below;

repadmin ? 
The above command will show you the help menu with all the command line options.

repadmin /replsummary
The above command you can use to show the overall replication health in percentage attempt that has failed.

repadmin /showrepl
The above command is helpful to understand of each domain controller in replication process. It displays the GUID of each object that replicated.


 repadmin /showrepl "Server Name"
This command show you the replication of a particular domain controller you can use this command by mentioning the name of the server in "Server Name" after typing command.

repadmin /showrepl /errorsonly
 If you want to see errors only in output you can use the above command.


repadmin /syncall dc1 /AeD

 The above command is used if you want to force the replication between domain controllers.