Computers are not connecting to new DNS server

I removed our old DNS server and replaced it with a new one over two weeks ago.  When I do ipconfig /all from the computers they still show the old DNS server.  
How do I fix this?
J.R. SitmanIT DirectorAsked:
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AnuroopsunddCommented:
are the machine getting ip from DHCP server. change the DNS server address in the DHCP server scope.
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motnahp00Commented:
How about adding an additional IP address to your adapter on your server? Screen cap
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J.R. SitmanIT DirectorAuthor Commented:
I changed the DHCP server.  When will the computers get the new DNS server?  At reboot?
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motnahp00Commented:
Run

ipconfig /release & ipconfig /renew

Pretty much instantly.
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AnuroopsunddCommented:
when they renew the ipaddress from the DHCP or run ipconfig /renew on client side.
..just make sure DNS server entry is not made on client side.
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J.R. SitmanIT DirectorAuthor Commented:
I tested one and it got the new address after reboot.

Thanks
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J.R. SitmanIT DirectorAuthor Commented:
Thanks
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