Post Update: You can get the Final Release version of Windows Server 2012 from this link.
Microsoft has released the Release Candidate for Windows Server 2012, (previously codenamed as Windows Server 8). This release came alongside the Windows 8 Release Preview. Windows Server 2012 is the successor of Windows Server 2008 R2. You can download this latest edition from the link given at of this post.
Windows Server 2012 is meant to offer a more scalable and multitenant-aware operating system that is optimized for cloud computing. According to Microsoft, Windows Server 2012 Release Candidate (RC), “Takes you beyond virtualization”.
Before you download Windows Server 2012, don’t forget to check out the following:
Installation: Windows Server 2012 Release Preview is available as an ISO, as well as a virtual hard drive (VHD). The ISO is available in the following languages: Chinese (Simplified and Traditional), English, French, Russian, Spanish, German, Japanese, Korean, Portuguese (Brazil), Swedish, and Turkish. The VHD is available only in English. Also see the post: How To Install Windows Server 2012 From USB.
Virtualization: As this is not a stable release, you may encounter some issues. It is advised that you should run this operating system in dual boot or as a virtual machine. You can create a virtual machine by following instructions given in this guide:How To Install Windows Server 2012 On VirtualBox.
System Requirements: Also check out the Windows Server 2012 System Requirements And Pre-Installation Information.
Download Windows Server 2012 [Official Microsoft Link]