If you are running your Lync 2013 system on Windows 2012 Servers and want to provision your Windows 2012 DHCP server with the required DHCP options 43 and 120 for Lync Phone Edition you might run into this issue.
From your Lync standard or front-end server you copy the files
from the folder "C:\Program Files\Common Files\Microsoft Lync Server 2013" to your Windows 2012 DHCP Server, but trying to start DHCPUtil.exe the following message shows up
DHCPUtil.exe needs two .dll files to start up
To fix this, go to "C:\Windows\System32" on your standard or front-end server and you will find the files there. Next, simply copy them to "C:\Windows\System32" on the DHCP Server and DHCPUtil.exe will now run.
For more info on DHCPUtil.exe.