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| Version of the Windows NT operating system | |
 | |
 Screenshot of Windows Server 2012 R2, showing the Server Manager application which is automatically opened when an administrator logs on, start button, taskbar, and the blue color of Aero Lite | |
| Developer | Microsoft |
|---|---|
| OS family | Windows Server |
| Working state | Current |
| Source model | Closed source / Shared source |
| Released to manufacturing | August 27, 2013[1] |
| General availability | October 17, 2013[2] |
| Latest release | 6.3.9600 with May 2025 monthly update rollup / May 13, 2025[3] |
| Marketing target | Business |
| Update method | Windows Update, Windows Server Update Services, SCCM |
| Platforms | x86-64 |
| Kernel type | Hybrid (Windows NT kernel) |
| Default user interface | Windows shell (GUI) |
| License | Trialware |
| Preceded by | Windows Server 2012 (2012) |
| Succeeded by | Windows Server 2016 (2016) |
| Official website | Windows Server 2012 R2 (archived at Wayback Machine) |
| Support status | |
| |
| Part of a series of articles on |
| Windows 8 |
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| Siblings |
| Related |
Windows Server 2012 R2, codenamed "Windows Server Blue", is the tenth major version of the Windows NT operating system produced by Microsoft to be released under the Windows Server brand name. It was unveiled on June 3, 2013, at TechEd North America,[5] and released on October 18 of the same year.[2] It is the successor to Windows Server 2012, and is based on the Windows 8.1 codebase. It is the final version of Windows Server to use the "R2" suffix, which had been used since the release of Windows Server 2003 R2.[6]
It removed support for processors without CMPXCHG16b, PrefetchW, LAHF and SAHF.
A further update, formally designated Windows Server 2012 R2 Update, was released in April 2014.[7] It is a cumulative set of security, critical and other updates.[8] Windows Server 2012 R2, like previous versions of Windows Server before it and versions after it, is only compatible with 64-bit processors.
It was succeeded by the Windows 10-based Windows Server 2016. Mainstream support ended on October 9, 2018, and extended support ended on October 10, 2023. It is eligible for the paid Extended Security Updates (ESU) program, which offers continued security updates until October 13, 2026.
- ^ Anderson, Brad (27 August 2013). "Today is the RTM for Windows Server 2012 R2!". Enterprise Mobility and Security Blog. Microsoft.
- ^ a b Jeff Meisner (August 14, 2013). "Save the date: Windows Server 2012 R2, Windows System Center 2012 R2 and Windows Intune update coming Oct. 18 - The Official Microsoft Blog - Site Home - TechNet Blogs". TechNet Blogs. Retrieved February 10, 2014.
- ^ "May 13, 2025—KB5058403 (Monthly Rollup)". support.microsoft.com. May 13, 2025.
- ^ "Search product lifecycle – Windows Server 2012 R2". Microsoft.com. Retrieved December 27, 2018.
- ^ Damien Caro (June 10, 2013). "Windows Server 2012 R2–First look - Damien Caro's Blog - Site Home - TechNet Blogs". Blogs.technet.com. Retrieved June 25, 2013.
- ^ "What is Windows Server?—IT Glossary | SolarWinds".
- ^ "August updates for Windows 8.1 and Windows Server 2012 R2 - Windows Experience BlogWindows Experience Blog". blogs.windows.com.
- ^ "Windows Server 2012 R2 Update (KB2919355)". Microsoft Download Center.
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