Microsoft is planning to convert Microsoft Office 2019 and 2021 for Mac to view-only mode on July 13, 2026, due to a certificate expiration, despite previously assuring customers that the apps would continue to function after end of support. This change will affect users who have not updated to the latest version of Office or subscribed to Microsoft 365. The company is offering alternatives, including switching to the free Microsoft 365 web apps or paying for a Microsoft 365 subscription. The move has sparked controversy among users and experts, with some accusing Microsoft of planned obsolescence.