I have a WS2012R2 Server.  In ipconfig /all I am getting a "Duplicate" in my server ipv4 address for my Windows 7 host computer. 

Also when I log into my Windows 7 host with a AD UC user in ipconfig it shows the host IPv4 as "Preferred" but the server IPv4 Address has the "Duplicate".

I cleared all of the nonessential IPs in DNS Manager.

What am I doing wrong?

It depoends how are IP addresses assigned. For static addresses you can easily change settings, for DHCP make exception range that excludes server IPs.

If this hint does not help, publish here output from  ipconfig /all

Regards

Milos

I have a WS2012R2 Server.  In ipconfig /all I am getting a "Duplicate" in my server ipv4 address for my Windows 7 host computer. 

Also when I log into my Windows 7 host with a AD UC user in ipconfig it shows the host IPv4 as "Preferred" but the server IPv4 Address has the "Duplicate".

I cleared all of the nonessential IPs in DNS Manager.

What am I doing wrong?

You should consider DHCP IP Address reservation, like IP Address 192.168.123.1 to 20 is reserved for your servers, wireless routers, printers etc. The rest is for your client, in this way you will avoid duplicate or IP conflict.

But of course you should document the IP Address, in order not to duplicate static IPs.

check out links below on how to set DHCP IP Reservation:

https://technet.microsoft.com/en-us/library/cc758459(v=ws.10).aspx

https://technet.microsoft.com/en-us/library/cc779507(v=ws.10).aspx

Good l