DNS Suffix

Posted on 2009-04-28
Last Modified: 2012-05-06
A year ago we removed a subdomain from our forest and slowly have found a few refrences to it still on the system so lately had pressumed nothing to do with that subdomain exsits anymore.

until today

if we do ipconfig /all on the DCs we get a the DNS Suffix Search List show the domain that shouldnt exist anymore

anyone know of a way to remove this?
Question by:Bolton09
    LVL 40

    Expert Comment

    Go to the TCP/IP Settings of your NIC -> Advanced, DNS tab. There you will probably see the suffix added. Just remove it from there.


    Author Comment

    yes thanks ive seen that but really i am wondering if we should run a utility or something to find/remove old domain information

    (the person who removed it is no longer here so we don't know what he did exactly)

    LVL 40

    Accepted Solution

    You can use this KB article ( to assist with that. Now I know this says "unsuccessful attempt...", but it is a good way to check even under normal demotion to see if all data has been removed from AD. And also see:

    LVL 18

    Expert Comment

    If you find these in many clients, you should probably use GPO to make the adjustment. The setting in a GPO can be found from Computer Configuration>Administrative Templates>Network>DNS Client>DNS Suffix Search List>DNS Suffixes.
    This way you don't have to make changes in machine by machine.

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