Duplicate name on network

Question

_{Tuesday, March 20, 2018 4:00 AM}

Hi, Is there a way to prevent joining a client to a domain with the same host name. Previously in older version of Windows there's a prompt saying that "duplicate name exist" but in this time there is none. Is there a configuration in the domain server or in group policy that we can implement to eliminate this problem? Thank you.

All replies (6)

_{Tuesday, March 20, 2018 11:21 PM}

Is there an error when trying to add the same computer name? What domain level are you connected to?

_{Tuesday, March 20, 2018 11:36 PM}

1]Open Command Prompt as Admin and type the following commands followed by hitting the Enter keys:

ipconfig /release

ipconfig /renew

2]Open Device Manager and check for any hidden any network adapter, if present, uninstall that.

3]Open Command Prompt as Admin and type the following command:

nbtstat –n

it’ll show you a conflicting workstation if there is one.

Right click on This PC > Properties > Change Settings under Computer name.domain and work group settings > Computer name > Change

S.Sengupta,Microsoft MVP Windows and Devices for IT, Windows Insider MVP

_{Wednesday, March 21, 2018 7:29 AM}

Hi,

The "Duplicate name exists" error indicates the (NetBIOS) name of the Windows computer conflicts with some other name on the network. Most commonly, this happens when another Windows computer on the local network uses the same name. This error can also occur when one of the connected Windows workgroups has the same name as the computer. "Duplicate name exists" errors prevent a Windows computer from joining the network.

“Duplicate name exists on the network” Windows Error

https://www.online-tech-tips.com/computer-tips/duplicate-name-exists-on-the-network-windows-error/

Please Note: Since the website is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.

Hope it will be helpful to you

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_{Thursday, April 5, 2018 11:35 PM}

Hi, Actually there's no error "duplicate name exist". It's just that when we generate list of workstations joined to the domain we found that there are duplicate hostname. We suspect that this is one of the causes of the "Trust relationship error". Why is it that the domain controller allow 2 computers with the same name to be joined to the domain?

_{Friday, April 6, 2018 1:00 PM}

Do the PCs with the duplicate names login to AD ok?

How are you generating the list of the workstations? Can you see the duplicate searching with Active Directory Users and Computers?

_{Thursday, April 19, 2018 6:54 AM}

We have a tool -OCS Inventory that can generate duplicate workstation. I tried to generate juts today, only 2 workstations have duplicate hostname but from different domain. Is there a way we can avoid it?