Microsoft will remotely downgrade perpetually-licensed copies of Office 2019 and Office 2021 for Mac and iOS into “reduced functionality mode” on July 13, 2026, the date a license-validation digital certificate embedded in those apps expires. In this mode, files can be opened and viewed but not edited or saved. The change affects any installation that has not been updated to at least version 16.83 on macOS or 2.93 on iOS — updates that in turn require macOS 12 (Monterey) or later, effectively locking out users whose hardware cannot support it. Notably, Office 2021 for Mac is still within its mainstream support window until October 2026, meaning Microsoft is degrading a product it has not yet officially discontinued.
The conversion directly contradicts Microsoft’s own prior public statements. The company’s October 2023 end-of-support page for Office 2019 for Mac assured customers that their apps would “continue to function” and they would not “lose any data.” By May 30, 2026, that page had been quietly re-dated to May 15, 2026 and rewritten — the “continue to function” clause removed entirely, replaced with narrower language stating data “can be accessed on any supported Microsoft 365 or Office product.” Microsoft has not issued a statement reconciling the July 2026 conversion with the original promise. Consumer Rights Wiki’s documentation of the episode drew 979 points and over 360 comments on Hacker News; commenters flagged potential violations of Australian consumer law under ACCC protection rules, and some speculated the accelerated certificate retirement may be connected to preventing AI agent workflows from running bulk instances of offline-licensed Office. Users who cannot or will not upgrade have been pointed toward LibreOffice as a free alternative; Microsoft’s own official paths require either a Microsoft 365 subscription or a purchase of the newer perpetual Office 2024 for Mac.