Here the basic idea is to create PXE images on other server (Where ADK 8.0 installation is supported) beacuse you cannot install ADK 8.0 on Win 2003 server.
Execute below step to understand it in better way.
1. Go to PXE configuration utility on Win 2003 server and create new PXE image using User Supplied option
2. Note down the Menuoption for the PXe image you are going to create on Win 2003 server (In my case its menuoption161)
3. When you select USer Supplied option, it will ask the path for PXE boot files (X86 and X64).
Here you have to provide the path of /express\PXE\Images\MenuOption163\X86PC) for x86 and /express\PXE\Images\MenuOption163\X64) from server where you have created PXE images. [In my case I have setup Win 2008 R2 server and created PXE image with MenuOption163 ]
4. Click ok and Save images.
5. Go to path /express\PXE\Images on Win 2003 server and open menuoption folder for images that you have created. [In my case it is menuoption161]
6. Now if you can see it has both the files menuoption161.0[This shows the correct number as 161] and menuoption163.efi [This shows 163 instead of 161 which will failed to boot UEFI clients , So just change its name to menuoption161.efi]
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Could you please also share with us you DHCP settings if you do not use IP helpers? If I set option 67 to BStrap\x64\BStrap.efi I get error PXE-E16: No offer received. I tried to use option 43 for PXE force mode but without success.
<Answer> : We are not using PXE forced mode.