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Update duplicate-active-directory-replication-connections.md
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Deland-Han authored May 27, 2024
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---
title: Duplicate Active Directory replication connections are created
description: Provides a solution to an issue where duplicate Active Directory replication connections are created for one or more domain controllers across one or more sites.
ms.date: 12/26/2023
ms.date: 05/27/2024
manager: dcscontentpm
audience: itpro
ms.topic: troubleshooting
Expand All @@ -13,7 +13,7 @@ ms.custom: sap:Active Directory\Active Directory replication and topology, csstr

This article provides a solution to an issue where duplicate Active Directory replication connections are created for one or more domain controllers across one or more sites.

_Applies to:_   Windows Server 2012 R2
_Applies to:_   All supported versions of Windows Server
_Original KB number:_   3207569

## Symptoms
Expand All @@ -38,15 +38,16 @@ To collect the relevant data for this issue, follow these steps.
1. Run `repadmin /showconn <DCNAME> >showconn.txt`.
2. Run `repadmin /failcache <DCNAME> >failcache.txt`.
3. Run PortQRYUI on \<DCNAME>, and target a remote domain controller that you have duplicate connections with, as follows:
"Domains and Trusts test" File / Save Result
3. Run [PortQRYUI ](https://download.microsoft.com/download/3/f/4/3f4c6a54-65f0-4164-bdec-a3411ba24d3a/PortQryUI.exe)on \<DCNAME\>, and target a remote domain controller that you have duplicate connections with, as follows:
"Domains and Trusts test" File / Save Result
4. On \<DCNAME>, run `repadmin /bind RemoteDC` (from step 3). For example: `repadmin /bind RemoteDC1`
5. If `repadmin /bind` fails to connect, take a network trace by using netsh on both domain controllers, as follows:
1. Run `netsh trace start capture=yes tracefile=c:\%computername%.etl`.
1. Run `repadmin /bind <DCNAME>`.
2. Connect by using the FQDN instead of the host name, if possible.
2. Run `netsh trace stop`.
6. Run `repadmin /showrepl * /csv >showrepl.csv`.
6. Run `repadmin /showrepl * /csv >showrepl.csv` or `repadmin /showrepl * /csv | convertfrom-csv | out-gridview` from elevated PowerShell windows to send the output to an interactive table in a separate window.

7. Run `repadmin /viewlist * >DCs.txt`.
8. Run `repadmin /istg >istg.txt`.

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