Intel I218V and Intel I211-AT driver solution for Windows Server 2012 R2
Its appears to be a common problem with this network adapters and server versions of Windows. This post solves problem with Server 2012R2, but it can be used for other versions of Windows Server i.e 2008, 2008R2, 2012 and 2016. There are now official drivers for Intel I211-AT and Intel I218V. But there are drivers for same adapters with different letter indexes. Idea is simple - Intel separates chips for desktop and server versions, forcing to setup more expensive versions of this chips for servers. I`m not sure if there any serious difference, but Asus use desktop versions for their motherboards since they targets for desktop segment. So its incorrect to blame Asus for not supporting Server versions of Windows on support page. At the same time many users would like to install Windows server OS on their Asus motherboards. Funny situation - Gigabyte uses cheap Realtek network adapters on their motherboards and have no problems. But Intel adapters are more powerful.