Microsoft announced that starting July 13, 2026, Office 2019 for Mac will enter reduced functionality mode. Users will only be able to open and print files but will lose the ability to edit, save, or create new documents due to an expiring digital certificate that validates Office licenses [1, 2].
This transition comes after Office 2019 for Mac reached its end of support on October 10, 2023, when Microsoft stopped providing updates. The company said, "Office 2019 for Mac reached end of support on October 10, 2023, and no longer receives updates. Because Office 2019 cannot be updated to the required version, this issue cannot be resolved by updating or reinstalling Office 2019 for Mac" [1].
Microsoft confirmed the certificate issue affects only Office on macOS and iOS platforms; Windows and Android versions are not impacted [2]. Older versions of Microsoft 365 apps on iOS and Mac also face this problem but can resolve it by updating the apps [1, 2].
Office 2021 for Mac remains supported until October 13, 2026, and will receive a certificate update to prevent similar disruptions [1, 2]. Microsoft suggests users affected by the Office 2019 change either subscribe to Microsoft 365 or purchase Office 2024 to maintain document editing capabilities beyond July 2026 [1, 2].
Microsoft initially said in 2023 that Office 2019 would continue functioning despite support ending but later removed this claim, now only assuring users their data will not be lost [1, 2].
The timeline of key dates includes Microsoft ending Office 2019 support on October 10, 2023; the reduced functionality mode beginning on July 13, 2026; and Office 2021 support ending October 13, 2026 [1, 2].
Users of Office 2019 for Mac should plan upgrades or subscription changes before mid-July 2026 to avoid losing full editing access.
