Microsoft Pauses KB5002907 After Office 2016 and 2019 Deactivations

Microsoft paused the optional KB5002907 update after reports that it deactivated legitimate perpetual-license Office 2016 and Office 2019 installations, causing applications to display “Unlicensed Product.” The update targeted systems running Microsoft 365 Apps more than 90 days behind on the Current Channel or Monthly Enterprise Channel, including some one-time-purchase Office Home & Business customers.

In rare cases, the update reportedly removed Office entirely; unconfirmed reports link failed reinstalls to systems combining 32-bit Office with 64-bit Microsoft Access Runtime. Microsoft is investigating and has halted the rollout. Affected users can try reactivating with the original product key or linked Microsoft account, while users whose Office installation was removed should download and reinstall their purchased version.