This is a small guide on how to change the network settings on Windows Server 2012.
Hover your mouse pointer to the lower right corner of the screen. 
Click on Settings
Click Control Panel
Click on Network and Internet
Click on View Network Status and Tasks
Click Change Adapter Settings
Right Click on the Network you want to change. Click Properties
Since we are going to change the IP Address for the IP4. Click Internet Protocol Version 4, Click Properties
Change the necessary information then Click Ok
There are a lot of ways to change the IP Address in Windows 2012. I have chosen this method to give a feel on how we will navigate on this operating system.
Enjoy and Cheers!
One Tech Day 