Microsoft Ends Support for Office Apps

Microsoft has announced that support for Office applications installed via the Microsoft Store will be discontinued starting December 2026. This decision affects all users who are still relying on the Store versions of Microsoft 365 Apps. From this date, no security updates will be provided, posing potential security risks for users. As of October 2025, the rollout of new feature updates for the Microsoft Store installation variant was already halted. Users are now urged to switch to the Click-to-Run versions of the Office applications to continue benefiting from new features and security updates.

Microsoft recommends making this transition early to avoid disruptions in usage. The Click-to-Run technology allows users to start applications immediately while the rest of the software is downloaded in the background. This differs from traditional installation methods, where the entire application must be installed before use. This method enhances the user experience by providing faster availability of the software. A key advantage of Click-to-Run installations is the automatic background updates.

Users no longer need to worry about manual updates, which increases efficiency and does not interrupt workflows. During the update process, applications can continue to be used, which is particularly important in business environments. To facilitate the transition from Microsoft Store versions to Click-to-Run variants, Microsoft provides the Office Deployment Tool (ODT). This command-line program allows users to download and deploy the Click-to-Run versions of the Office apps. Using the ODT requires basic command-line skills but offers a flexible installation option.

The decision to discontinue support for Microsoft Store versions is part of Microsoft’s strategy to promote the use of Click-to-Run installations. This strategy aims to enhance the security and user-friendliness of Office applications. Microsoft has previously emphasized that the future of Office software lies in the cloud and in flexible installation methods. Transitioning to Click-to-Run versions will be necessary for many users to continue receiving security updates. Microsoft has not released specific figures on how many users are still using the Microsoft Store versions.

The deadline of December 2026 provides a clear timeframe for the necessary transitions. Support for Microsoft Store versions will end on December 31, 2026. Users should therefore take timely action to ensure that their Office applications remain secure and up to date.