It’s my understanding that you should be able to buy the ESUs from any Microsoft CSP. The MAK will show up in the MAC (admin.microsoft.com), which you’ll add to each server using slmgr.vbs /ipk and then activate.

You’ll typically get 3 years of updates via ESU. Each license is only valid for a year, so you’ll need to re-license each server annually. In my experience, the cost per license doubles each year.

If you’re interested in getting in contact with someone who can sell you ESUs, send me a DM. They’re located locally to me (MN). I’m not sure if they’re able to sell to companies in other states, as they’re mostly a local MSP/ITSP, but it’d be worth asking.

Answer from big-green-man on community.spiceworks.com
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Microsoft Community Hub
techcommunity.microsoft.com › microsoft community hub › communities › products › windows › windows it pro blog
Windows Server 2012/R2: Extended Security Updates | Windows IT Pro Blog
December 1, 2023 - You can now get three additional years of Extended Security Updates (ESUs) if you need more time to upgrade and modernize your Windows Server 2012, Windows Server R2, or Windows Embedded Server 2012 R2 on Azure.
Discussions

Any guidance for purchasing Extended Security Updates (ESU) for Windows Svr 2012
We have a client that’s got a Windows Server 2012 R2 server and a pretty extensive Autodesk Revit deployment with Revit Servers 2018 through 2024. Their projects are typically very large and long running so there are still projects in Revit 2018 that are being actively worked on. More on community.spiceworks.com
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Windows 2012 extended support
Hello, We have so many on prem virtual machines running windows 2012 servers in the environment and I was reading that there is buy option to extend the support for patching and updates. I need help on how this can be accomplished. Do we buy license from Microsoft ? What type of license? More on community.spiceworks.com
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Windows Server 2012 and 2012 R2 end of support | Sysnative Forums
Microsoft support for Windows Server 2012 and Windows Server 2012 R2 ended 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. If you cannot upgrade to the next version, you will need to use Extended ... More on sysnative.com
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October 11, 2023
When extended support ends for 2012R2 does that also mean MS Defender will no longer be updated?
You can buy ESU from Microsoft. It’s security only updates for additional 3 years. It’s free on Azure, on prem 75% licensing cost year 1, 100% year 2 and 125% year 3 More on reddit.com
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It’s my understanding that you should be able to buy the ESUs from any Microsoft CSP. The MAK will show up in the MAC (admin.microsoft.com), which you’ll add to each server using slmgr.vbs /ipk and then activate.

You’ll typically get 3 years of updates via ESU. Each license is only valid for a year, so you’ll need to re-license each server annually. In my experience, the cost per license doubles each year.

If you’re interested in getting in contact with someone who can sell you ESUs, send me a DM. They’re located locally to me (MN). I’m not sure if they’re able to sell to companies in other states, as they’re mostly a local MSP/ITSP, but it’d be worth asking.

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We have a client that’s got a Windows Server 2012 R2 server and a pretty extensive Autodesk Revit deployment with Revit Servers 2018 through 2024. Their projects are typically very large and long running so there are still projects in Revit 2018 that are being actively worked on. We started working back in September of last year to try to migrate them to at least Revit 2021 (which supports Windows Server 2022) but we aren’t going to make it and they’re likely going to be stuck on Windows Server 2012 for quite a while. At this point, we have to start looking at how to keep the Server 2012 going for as long as we can and the Extended Security Updates seem to be our only option. We usually buy Microsoft licensing through TechData / TD Synnex but they have basically said “we don’t do that” and hung up. I’m digging around on the Microsoft site now to try to wrap my head around it but am not making a lot of progress. Can anyone here give me some pointers or point me in the right direction on this? My original hope was that there would just be a SKU that I’d buy that would give me a magical key or something to continue getting updates but that’s apparently not the case

@Microsoft

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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
May 5, 2023 - 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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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 - "You can now get three additional years of Extended Security Updates (ESUs) if you need more time to upgrade and modernize your Windows Server 2012, Windows Server R2, or Windows Embedded Server 2012 R2 on Azure," Microsoft said.
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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 - The German website Winfuture.de ... out in recent years that support for Windows Server 2012/R2 will be discontinued in October 2023....
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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 - In order to use IT Management Suite or Server Management Suite to distribute extended security updates for Windows Server 2012/R2, you must purchase an extended security update subscription for each server from Microsoft. In addition, you must purchase extended patch management support from ...
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Keller Schroeder
kellerschroeder.com › home › windows server 2012 r2 extended security updates
Windows Server 2012 R2 Extended Security Updates - Keller Schroeder
November 14, 2023 - Although most IT departments have been able to upgrade or migrate away from these servers, there may still be mission critical applications running on Windows Server 2012R2 that do not have an update available yet. For those instances Microsoft is able to offer the Extended Security Updates program. What is the Extended Security Updates Program (ESU)? It is a last resort for customers who need to run legacy Microsoft products past the end of support date.
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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 - This shouldn't be a surprise, as Microsoft had already issued a reminder at the beginning of this year. The statement explains that extended support for all Windows Server 2012 and Windows Server 2012 R2 editions is set to end on October 10, 2023.
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Sysnative
sysnative.com › relaxation and information center › news you can use › microsoft news
Windows Server 2012 and 2012 R2 end of support | Sysnative Forums
October 11, 2023 - Microsoft support for Windows Server 2012 and Windows Server 2012 R2 ended 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. If you cannot upgrade to the next ...
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Northwestern University
services.northwestern.edu › TDClient › 30 › Portal › KB › ArticleDet
Enabling Extended Security Updates for Windows Server 2012
To obtain Extended Security Updates (ESU) for Year 3, you must have previously purchased ESU licenses for Year 1 and Year 2.
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Schutten
schutten.cloud › post › arc-enabled-esu
Extended Security Updates enabled by Azure Arc for Windows Server 2012/R2 · SCHUTTEN.CLOUD
October 30, 2023 - Microsoft’s Extended Security Updates program is a lifeline for organizations that still rely on Windows Server 2012 and 2012 R2. This program offers extended security updates beyond the end-of-support date, providing critical security patches ...
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Licensingschool
licensingschool.co.uk › wp-content › uploads › 2024 › 01 › Extended-Security-Updates-Windows-Server-2012-v24.30.pdf pdf
Extended Security Updates: Windows Server 2012
Extended Security Updates overview · Windows Server 2012/2012 R2 reached end of support on · October 10, 2023. This means that no more security patches are · released to protect workloads running these versions of · Windows Server. The Extended Security Updates (ESU) program is a last resort ·
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Lammtech
blog.lammtech.com › blog › server-2012-r2s-end-of-support
Navigating Microsoft Server 2012 R2's End of Support: What to Know
August 14, 2023 - Opt for Extended On-Premises Security: ... away, organizations with Software Assurance or subscription licenses can purchase Extended Security Updates. This offers an additional three years of security updates for Windows Server 2012 and 2012 R2, providing ...
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Wikipedia
en.wikipedia.org › wiki › Windows_Server_2012_R2
Windows Server 2012 R2 - Wikipedia
3 weeks ago - Windows Server 2012 reached the end of mainstream support on October 9, 2018 and entered the extended support phase, which ended on October 10, 2023. Microsoft announced in July 2021 that they will distribute paid Extended Security Updates for ...