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Microsoft Learn
learn.microsoft.com › en-us › lifecycle › announcements › windows-server-2012-r2-end-of-support
Windows Server 2012 and 2012 R2 reaching end of support - Microsoft Lifecycle | Microsoft Learn
Windows Server 2012 and Windows Server 2012 R2 will end on October 10, 2023. After this date, these products will no longer receive security updates, non-security updates, bug fixes, technical support, or online technical content updates.
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Microsoft Learn
learn.microsoft.com › en-us › windows-server › get-started › extended-security-updates-overview
Overview of Extended Security Updates for Windows Server 2012, and 2012 R2 | Microsoft Learn
Extended support for Windows Server 2012 and Windows Server 2012 R2 ended on October 10, 2023. ... You can find information on support dates on Microsoft Lifecycle.
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Windows Central
windowscentral.com › software apps
Microsoft extends Windows Server 2012 lifeline to help admins transition to Windows Server 2022 (UPDATED)
November 13, 2023 - UPDATE: Microsoft recently announced that admins will get three additional years of Extended Security Updates (ESUs) for Windows Server 2012. Microsoft is ending support for Windows Server 2012 on October 10, 2023.
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Morphisec
morphisec.com › home › blog › windows server 2012 end of life –– how do you secure legacy servers?
Windows Server 2012 End of Life – What You Need to Know
April 21, 2025 - Microsoft is ending free updates, bug fixes, and technical support to an operating system still used in hundreds of thousands of enterprise servers. Microsoft allows customers to purchase Extended Security Updates (ESUs) until 2026.

Windows 8-based member of the Windows Server server operating systems line

Windows_Server_2012_Desktop.png
Windows Server 2012, codenamed "Windows Server 8", is the ninth major version of the Windows NT operating system produced by Microsoft to be released under the Windows Server brand name. It is … Wikipedia
Factsheet
Windows Server 2012 Version of the Windows NT operating system
Developer Microsoft
OS family Windows Server
Factsheet
Windows Server 2012 Version of the Windows NT operating system
Developer Microsoft
OS family Windows Server
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Wikipedia
en.wikipedia.org › wiki › Windows_Server_2012
Windows Server 2012 - Wikipedia
December 9, 2025 - Microsoft originally planned to end mainstream support for Windows Server 2012 and Windows Server 2012 R2 on January 9, 2018, with extended support ending on January 10, 2023. In order to provide customers the standard transition lifecycle timeline, ...
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BleepingComputer
bleepingcomputer.com › home › news › microsoft › microsoft extends windows server 2012 esus to october 2026
Microsoft extends Windows Server 2012 ESUs to October 2026
November 10, 2023 - Since it reached its end of support during the October 2023 Patch Tuesday, Redmond stopped providing technical assistance and bug fixes for newly identified issues affecting the stability or usability of systems running this operating system.
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FB Pro
fb-pro.com › home › windows server 2012/r2 – end of support: what you should do now
Windows Server 2012/R2 - End of support: What you should do now - FB Pro GmbH
August 4, 2025 - Microsoft is therefore making an exception and extending the Extended Security Update (ESU) for a further three years. This means that the final end for Windows Server 2012/R2 will not come until 13 October 2026 – provided you take advantage ...
Find elsewhere
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Broadcom
knowledge.broadcom.com › external › article › 407881 › extended-security-updates-for-windows-se.html
Extended Security Updates for Windows Server 2012 and Windows Server 2012 R2
August 20, 2025 - This means that the standard Windows patch management data feed does not identify extended security updates applicable to servers running those operating systems. Patch Management Solution 8.x, Server Management Solution 8.x IT Management Solution 8.x · Microsoft Windows Server 2012 and Windows Server 2012 R2 have reached their End of Life
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LogicMonitor
community.logicmonitor.com › customercentral › tech talk
Windows Server 2012: Microsoft End of Extended Support (10/10/2023) | LogicMonitor - 13880
October 15, 2023 - In case you were unaware, Windows Server 2012 and 2012 R2 and their derivatives recently reached Microsoft’s End of Extended Support date (October 10, 2023). https://learn.microsoft.com/en-us/lifecycle/products/?terms=server 2012 This means that Microsoft will no longer create non-security ...
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Microsoft Learn
learn.microsoft.com › en-us › lifecycle › products › windows-server-2012-r2
Windows Server 2012 R2 - Microsoft Lifecycle | Microsoft Learn
Microsoft Edge version 109 will receive critical security fixes and fixes for known exploit bugs until October 10, 2023, on these platforms. Please go here to learn more. Support dates are shown in the Pacific Time Zone (PT) - Redmond, WA, USA.
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Lansweeper
lansweeper.com › blog › end of life › windows server end of life
Windows Server End of Life - Lansweeper
2 days ago - Most Windows Server releases also ... roughly every 2 to 3 years. Windows Server 2012 and 2012 R2 went end of life on the 10th of October 2023....
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Microsoft Learn
learn.microsoft.com › en-us › lifecycle › products › windows-server-2012
Windows Server 2012 - Microsoft Lifecycle | Microsoft Learn
Microsoft Edge version 109 will receive critical security fixes and fixes for known exploit bugs until October 10, 2023, on these platforms. Please go here to learn more. Support dates are shown in the Pacific Time Zone (PT) - Redmond, WA, USA.
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Centretechnologies
blog.centretechnologies.com › help-with-windows-server-2012-end-of-support
Your Next Steps for the Windows Server 2012 End of Support
Windows Server 2012 reached its mainstream support end date over four years ago, in October 2018, but Microsoft pushed back the end date for extended support for five more years to allow customers to migrate to newer, under-support Windows Server ...
Published   March 31, 2023
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Quest Support
support.quest.com › kb › 4374010 › end-of-support-for-microsoft-windows-server-2012-and-windows-server-2012-r2
End of Support for Microsoft Windows Server 2012 and Windows Server 2012 R2 (4374010)
November 14, 2023 - Microsoft announced that the end of support date for Windows Server 2012 and Windows Server 2012 R2 is October 10, 2023. In order to continue to receive any security updates for Windows Server 2012 and Windows Server 2012 R2, it would be necessary to enroll in the Extended Security Update (ESU) ...
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Reddit
reddit.com › r/defenderatp › when extended support ends for 2012r2 does that also mean ms defender will no longer be updated?
r/DefenderATP on Reddit: When extended support ends for 2012R2 does that also mean MS Defender will no longer be updated?
June 11, 2023 -

I've been asked to test onboarding of W2K12 R2 which seems like a waste of time since I realize extended support for 2012 R2 ends on 10/10/23. In order to support my argument against spending my time performing this task I'm seeking definitive clarification whether or not when extended support ends if that also means that 2012 R2 will no longer receive MS Defender related updates? I assume "security updates" includes Defender, but I would appreciate it if someone can point me to a KB that explicitly says that support for Defender is also ending, or that Defender updates are included in "security updates." Thanks in advance.

https://learn.microsoft.com/en-us/lifecycle/announcements/windows-server-2012-r2-end-of-support

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HBS -
hbs.net › windows 2012 r2 end of life
Windows 2012 R2 End of Life - HBS
April 22, 2025 - Over a year has passed since Microsoft ended support for Windows Server 2012 and Windows Server 2012 R2 on October 10, 2023. SQL Server 2012 reached its end of support even earlier, on July 12, 2023.
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IceWarp Help Center
support.icewarp.com › hc › en-us › articles › 19244025305745-Microsoft-Windows-Server-2012-end-of-life-EOL
Microsoft Windows Server 2012 end of life (EOL) – IceWarp Help Center
Windows Server 2012 and Windows Server 2012 R2 will end on October 10, 2023. After this date, these products will no longer receive security updates, non-security updates, bug fixes, technical support, or online technical content updates.