Microsoft has announced that support for Office applications installed through the Microsoft Store will cease, with security updates ending in December 2026.
Feature updates for the Store‑based Microsoft 365 apps stopped in October 2025, and users must transition to the Click‑to‑Run installation method to continue receiving new features and security patches.
Click‑to‑Run differs from traditional installers by streaming the application during installation, allowing immediate use while remaining components download in the background.
The technology also handles updates automatically, applying patches without requiring user intervention or system restarts, thereby minimizing workflow disruption.
To migrate, users should obtain the Office Deployment Tool, a command‑line utility designed to download and deploy Click‑to‑Run versions of Office apps.
By creating a configuration file that specifies the desired Office suite and running the tool, the Click‑to‑Run suite installs alongside the existing Store apps, after which the Store versions can be removed.
Prompt migration is advised to ensure continued protection and functionality of Office applications beyond the December 2026 deadline.
