Do it with the command line
You’ve built a Windows server without the GUI (Server Core only). You’re thinking, I use the command line all the time, this will be easy. It won’t. This cheat sheet has a few useful bits and pieces on how to configure it.
#Force Windows Updates
(New-Object -ComObject Microsoft.Update.AutoUpdate).DetectNow()
#Dump the network interface config (to edit it)
netsh interface dump > netcfg.dat
#edit the config
notepad netcfg.dat
#Restore the interface config
netsh exec netcfg.dat