# Office 2016 and 2019 lost support in October 2025, and Office 2021 and Office LTSC 2021 followed in October 2026

> Microsoft’s lifecycle pages list Office 2016 and Office 2019 extended support ending 10/15/2025, and Office 2021 and Office LTSC 2021 ending 10/14/2026 (6:59:59 AM Pacific). Microsoft’s 2025 list shows the 2016 and 2019 apps, including Outlook, Publisher and Skype for Business, ending support on October 14, 2025.

- Canonical URL: https://update.dsesecurity.com/updates/office-2016-2019-2021-ltsc-2021-end-of-support-perpetual-office-replacement/
- Publisher: Detection Systems & Engineering (DSE Security)
- Author: DSE Security Editorial Team
- Published: 2026-10-18T21:01:21+00:00
- Modified: 2026-10-18T22:22:08+00:00
- Last reviewed by DSE: 2026-10-18
- Resource type: Briefing
- DSE priority: Important
- Topics: IT, Microsoft 365 & Identity
- Reading time: 2 minutes

## What you need to know

Microsoft’s lifecycle pages list Office 2016 and Office 2019 extended support ending 10/15/2025, and Office 2021 and Office LTSC 2021 ending 10/14/2026 (6:59:59 AM Pacific). Microsoft’s 2025 list shows the 2016 and 2019 apps, including Outlook, Publisher and Skype for Business, ending support on October 14, 2025.

## Potentially affected

Organizations and users running perpetual-license Office 2016, 2019, 2021 or Office LTSC 2021, including Outlook installs that connect to business mailboxes.

## DSE recommendation

DSE recommends replacing Office 2016, 2019, 2021 and LTSC 2021 installs with a supported Office version and removing the old suites.

## Article

Microsoft’s lifecycle pages list Office 2016 and Office 2019 extended support ending 10/15/2025, and Office 2021 and Office LTSC 2021 ending 10/14/2026 (6:59:59 AM Pacific). Microsoft’s 2025 list shows the 2016 and 2019 apps, including Outlook, Publisher and Skype for Business, ending support on October 14, 2025.

## Source facts

Microsoft’s lifecycle pages for [Office 2016](https://learn.microsoft.com/en-us/lifecycle/products/microsoft-office-2016) and [Office 2019](https://learn.microsoft.com/en-us/lifecycle/products/microsoft-office-2019) show both under the Fixed Lifecycle Policy with extended support ending 10/15/2025 at 6:59:59 AM Pacific Time, for editions including Home and Business, Home and Student, Professional and Professional Plus. Microsoft’s [list of products ending support in 2025](https://learn.microsoft.com/en-us/lifecycle/end-of-support/end-of-support-2025) includes Access, Excel, Outlook, PowerPoint, Project, Publisher, Skype for Business, Visio and Word 2016 and 2019, plus OneNote 2016, all on October 14, 2025.

The list says that upon retirement or end of support there are no new security updates, non-security updates, free or paid assisted support options or online technical content updates.

The [Office 2021 lifecycle page](https://learn.microsoft.com/en-us/lifecycle/products/office-2021) lists the Home and Business, Home and Student and Professional editions, including Mac versions of the first two, under the Modern Lifecycle Policy with a retirement date of 10/14/2026. The [Office LTSC 2021 page](https://learn.microsoft.com/en-us/lifecycle/products/office-ltsc-2021) lists the Standard and Standard for Mac editions under the Fixed Lifecycle Policy with a mainstream end date of 10/14/2026 and no extended support date.

## Applicability

Use this for any device with a perpetual Office license. Microsoft 365 subscription apps and newer perpetual releases follow their own lifecycle pages; check them before choosing a replacement.

## DSE recommendation

DSE recommends replacing Office 2016, 2019, 2021 and LTSC 2021 installs with a supported Office version and removing the old suites. Inventory installed Office versions from management tools, include Visio and Project licenses in the plan, and test templates, macros and add-ins against the replacement before rollout.

## Verification

Run a software inventory report after the rollout, confirm no 2016, 2019 or 2021 Office builds remain, and check that Outlook clients connecting to company mail are on a supported version.

## Official references

[Microsoft Lifecycle — Microsoft Office 2016](https://learn.microsoft.com/en-us/lifecycle/products/microsoft-office-2016). [Microsoft Lifecycle — Microsoft Office 2019](https://learn.microsoft.com/en-us/lifecycle/products/microsoft-office-2019). [Microsoft Lifecycle — Ending Support in 2025](https://learn.microsoft.com/en-us/lifecycle/end-of-support/end-of-support-2025). [Microsoft Lifecycle — Office 2021](https://learn.microsoft.com/en-us/lifecycle/products/office-2021). [Microsoft Lifecycle — Office LTSC 2021](https://learn.microsoft.com/en-us/lifecycle/products/office-ltsc-2021). Reviewed October 18, 2026.

## Primary reference

- Name: Microsoft Lifecycle — Microsoft Office 2016
- Authority: Microsoft Learn
- URL: https://learn.microsoft.com/en-us/lifecycle/products/microsoft-office-2016
- Source publication date: Not stated by the source

## Citation and use

Preferred citation: “Office 2016 and 2019 lost support in October 2025, and Office 2021 and Office LTSC 2021 followed in October 2026,” DSE Security, https://update.dsesecurity.com/updates/office-2016-2019-2021-ltsc-2021-end-of-support-perpetual-office-replacement/
Publishing principles: https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/
Usage and citation policy: https://update.dsesecurity.com/usage/
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