Microsoft's Office 2019 apps for Mac will stop working next month, because the company isn't renewing a certificate that validates Office licenses. Owners of Office 2019 for Mac are being warned they'll have to purchase Office 2024 or a Microsoft 365 subscription if they want to continue editing documents. Microsoft previously promised that "all your Office 2019 apps will continue to function," when it announced end of support in 2023. The company then quietly updated that support note last mont