Office 2021 End of Support: What Ended on October 13, 2026 and What Your Nonprofit Should Do

By Josh Bass, Cybersecurity Consultant, CompTIA Security+ Certified. Published 15 October 2026. Last reviewed 15 October 2026.

The Office 2021 end of support came on October 13, 2026, with no extension and no extended security updates, according to Microsoft’s end of support notice. Microsoft says the apps may continue to function but warns of “serious and potentially harmful security risks”. Windows 10 support ended October 14, 2025, and Windows Server 2012 R2’s latest listed Extended Security Update year ended 10/14/2026 6:59:59 AM.

As of 15 October 2026, when Scottship Solutions checked Microsoft’s pages, organizations could still buy Windows 10 Extended Security Updates at $61 per device for Year One through Microsoft Volume Licensing. As of 2026, the price doubles every consecutive year for a maximum of three years, and an organization that joins in Year Two pays for Year One too. Office 2021 has no paid route like that.

The next step for a nonprofit is to find every machine still running Office 2021, Windows 10 or Windows Server 2012 R2, including laptops used by part-time staff and volunteers. Each one then needs a decision: replace it, upgrade it, or cover it with paid updates where Microsoft still sells them. A Tech Stack Audit for nonprofits identifies security gaps.

Which Microsoft products lost support in October 2026?

Office 2021 is the one product here whose support ended outright in October 2026, with no paid extension. Windows Server 2012 R2 reached the end of Extended Security Update Year 3, which the Windows Server 2012 R2 lifecycle page dates 10/14/2026 6:59:59 AM. Windows 10 is a year further on: support ended on October 14, 2025, according to Microsoft’s Windows 10 Extended Security Updates page, and as of 2026 paid updates are still on sale.

Microsoft’s own pages give Office 2021 two dates. The support notice says October 13, 2026, while the Office 2021 lifecycle page lists a retirement date of 10/14/2026 6:59:59 AM. Scottship Solutions reads the two as one deadline and plans as if October 13 was the last supported day.

Nonprofits without an IT person feel these dates differently from a company with a help desk. Nobody is watching for the cutoff, so an unsupported laptop or server can stay in daily use long after the date, holding donor records, grant files and client data. Microsoft’s own description of running Office 2021 past its date is “serious and potentially harmful security risks”.

The table puts the four Microsoft programs side by side, with every price as Microsoft’s pages showed it when Scottship Solutions checked them on 15 October 2026.

Microsoft end of support dates and extension prices, as of October 2026 (checked 15 October 2026)

What happens when Office 2021 support ends and what should our nonprofit do?

Office 2021 apps keep opening after October 13, 2026, because Microsoft says they may continue to function. What stops is support itself. As of 2026, Microsoft offers no extension and no extended security updates for Office 2021, so unlike Windows 10 there is nothing to buy that keeps it covered.

Scottship Solutions treats the decision as a replacement question, not a renewal one. The options are moving each machine to a supported Office release or to a Microsoft 365 plan. Scottship Solutions did not capture a dated price for either option, nonprofit or retail, when it checked Microsoft’s pages on 15 October 2026, so this post quotes none; confirm the current offer before you budget.

Do the work in this order, so the replacement does not stall on a machine nobody remembered.

1. List every machine with Office 2021, including laptops used by part-time staff and volunteers who open donor or client files.
2. Decide per machine whether it moves to a supported Office release or a Microsoft 365 plan, and get a dated quote before the finance lead puts it in the budget.
3. Check the operating system underneath. A machine on Office 2021 may also be on Windows 10, which has its own deadline and its own price, set out in the next section.

How much do Windows 10 Extended Security Updates cost an organization in 2026?

As of 2026, Windows 10 Extended Security Updates for organizations cost $61 USD per device for Year One through the Microsoft Volume Licensing Program. That is the figure Microsoft’s page showed when Scottship Solutions checked it live on 15 October 2026; the page itself is dated 17 November 2025. It is a dated vendor detail, not a client result.

Three rules on the same page change what a late decision costs. As of 2026, Microsoft’s page says Year One starts in November 2025 and the program is sold by the year, with no partial periods. As of 2026, the price doubles every consecutive year, for a maximum of three years. As of 2026, an organization that buys in Year Two pays for Year One too, because Microsoft treats ESUs as cumulative.

As of 2026, waiting does not save money: a device enrolled in Year Two still pays for Year One. As of 2026, the minimum purchase is one license, so if one PC holding the donor database cannot move yet, your nonprofit can cover that machine alone. Microsoft’s page names “organizations and businesses” and states no nonprofit price, so plan on the organization price. If your ESU budget needs board approval, take it to the board before Year Two, because joining later still means paying for Year One.

As of 2026, Microsoft also gives ESU at no additional cost to Windows 10 virtual machines in nine services: Windows 365, Azure Virtual Desktop, Azure virtual machines, Azure Dedicated Host, Azure VMware Solution, Nutanix Cloud Clusters on Azure, Azure Local, Azure Stack Hub and Azure Stack Edge. As of 2026, Windows 10 endpoints that connect to Windows 365 Cloud PCs are entitled to ESU for up to three years with an active Windows 365 subscription license.

As of 2026, Microsoft sells a separate consumer ESU on microsoft.com, with its terms in the table above: a one-time purchase, Microsoft Rewards points or a no-cost route through syncing PC Settings, one license for up to 10 devices, and enrollment open until the program ends on October 12, 2027. As of 2026, Microsoft’s consumer page says the consumer ESU program can’t be used in commercial scenarios and is not offered for devices joined to an Active Directory domain or Microsoft Entra or enrolled in a Mobile Device Management (MDM) solution, so it does not cover office machines your nonprofit manages that way. The consumer page and the organization page describe separate offers, and only the organization page states the Volume Licensing price.

Is Windows Server 2012 R2 still getting security updates?

Windows Server 2012 R2 is not, on the dates Microsoft lists. Extended support ended on 10/11/2023, and the lifecycle page lists three Extended Security Update years after it: Year 1 to 10/9/2024, Year 2 to 10/15/2025, and Year 3 to 10/14/2026 6:59:59 AM. Year 3 is the latest ESU year Microsoft lists, and the page lists no ESU year after it.

Microsoft’s lifecycle page states no ESU price for Server 2012 R2, so this post gives none. If your nonprofit still runs Server 2012 R2 for shared grant files, the donor database or staff sign-ins, raise that server with your executive director first, since the latest ESU year Microsoft lists has ended. Moving a server’s workload is the kind of project Scottship Solutions handles under managed IT services for nonprofits.

Sources and further reading

• Extended Security Updates (ESU) program for Windows 10, Microsoft Learn, page dated 17 November 2025, checked 15 October 2026: the Year One price for organizations through Microsoft Volume Licensing, the yearly doubling rule and three-year maximum, the November 2025 start of Year One and the cumulative rule for Year Two buyers.
• Windows 10 Extended Security Updates, Microsoft, checked 15 October 2026: the consumer ESU enrollment options, how many devices one license covers, and the program end date of October 12, 2027.
• End of support for Office 2021, Microsoft Support, checked 15 October 2026: support for Office 2021 ended on October 13, 2026, with no extension and no extended security updates.
• Office 2021 lifecycle, Microsoft Learn, page updated 24 January 2024, checked 15 October 2026: retirement date 10/14/2026 6:59:59 AM.
• Windows Server 2012 R2 lifecycle, Microsoft Learn, page updated 17 January 2023, checked 15 October 2026: extended support ended 10/11/2023; Extended Security Update Year 3, the latest year listed, ends 10/14/2026 6:59:59 AM.

Which of your machines are still running Office 2021, Windows 10 or Server 2012 R2?

An inventory answers it: every device, including the part-time staff and volunteer laptops that open donor or client files, with the Office version on it and the Windows or Windows Server version underneath. Microsoft’s pages give the deadlines but not your list of machines. The security controls review in the Scottship Solutions Tech Stack Audit identifies security gaps, and the table above gives the dates to check each device against.

Related reading

• nonprofit cybersecurity guide
• nonprofit IT infrastructure problems

Written by

Josh Bass

Cybersecurity Consultant at Scottship Solutions

Josh leads security assessments and compliance audits for mission-driven organizations. He helps nonprofits build defensible security postures, meet HIPAA and state privacy requirements, and respond to threats before they become incidents.

Certifications

CompTIA Security+ Certified

Industries Served

Healthcare & Community Health (HIPAA), Human Services, Child Advocacy, Foundations & Grantmakers