> After Office 2019 for Mac reached end of support in October 2023, Microsoft assured customers their installed apps would "continue to function." The July 13, 2026 conversion instead drops the apps into a Microsoft-defined "reduced functionality mode," in which files can be opened and viewed but not edited or saved.
https://consumerrights.wiki/w/Microsoft_Office_2019_and_2021_for_Mac_view-only_conversion_(2026)


