Microsoft is moving Microsoft 365 Apps for Windows away from the Microsoft Store installation model, and the practical message for users is simple: confirm how Office is installed before security updates stop. The change does not mean Word, Excel, PowerPoint, Outlook, or OneNote are going away. It means the Store-packaged version of Microsoft 365 Apps is being retired in favor of Microsoft’s Click-to-Run installer, which is already the standard deployment path for most consumer and business installations.

For many Windows 11 users, this will be invisible until they look at the account screen inside an Office app. The Store and Click-to-Run versions can look almost identical in day-to-day use, but they are serviced differently. Microsoft says feature updates for the Microsoft Store installation type stopped in October 2025, and security updates are scheduled to end in December 2026. That makes this a housekeeping task worth completing well before the final deadline, especially on business PCs and shared devices.

What is changing

The affected product is not a Microsoft 365 subscription itself. It is the installation type used to place the desktop Office apps on a Windows PC. Store installations use app packaging and update flows associated with the Microsoft Store and Windows Update. Click-to-Run uses Microsoft’s Office streaming and servicing technology, downloads updates directly from Microsoft’s content delivery infrastructure, and supports the update channels administrators commonly use across organizations.

That distinction matters because Microsoft 365 Apps have become more than static desktop programs. New features, security fixes, cloud-connected capabilities, and Copilot-related changes need a servicing model that can move quickly and predictably. Click-to-Run is the platform Microsoft has standardized around for those requirements.

Why IT teams should care

For individual users, the migration is mostly about staying supported. For IT departments, it is also about management. Store-based Office installs have historically been awkward in managed environments because they do not provide the same level of control as Click-to-Run deployments. Click-to-Run works with the Office Deployment Tool, Microsoft Intune, Configuration Manager, shared device activation, update channel policies, and XML-based configuration.

Those capabilities are not minor conveniences. They determine how an organization stages new Office builds, delays feature changes, responds to zero-day fixes, manages bandwidth, and supports multi-user scenarios. If a fleet contains a mix of Store and Click-to-Run installs, administrators may see inconsistent update behavior and less predictable compliance reporting. A quiet Office servicing mismatch can become a real operational risk when deadlines approach.

How to check your Office installation type

The fastest check is inside any Microsoft 365 desktop app. Open Word, Excel, PowerPoint, or another Office app, then go to Account or Office Account from the file menu. In the product and update information area, look for the installation or update channel details. Systems already using Click-to-Run should show Click-to-Run wording or the familiar Office update channel information. A PC still on the retiring package will indicate the Microsoft Store installation type.

This is a useful five-minute audit for home users, but it is also a sensible help desk script. If you support family members, small offices, labs, or kiosks, check the installation type now rather than waiting until security update cutoff dates are close. The distinctive migration checkpoint is the phrase “Microsoft Store installation type” appearing where Click-to-Run should be.

What to do if you are affected

If the PC shows the Microsoft Store installation type, move it to Click-to-Run. Microsoft’s current guidance is that the Click-to-Run installer can detect the Store version, remove it, and install the supported version without requiring a separate manual uninstall. Users should not need to buy a new license simply because they are changing the installation technology; the entitlement comes from the Microsoft account, Microsoft 365 subscription, or organizational license.

Before migrating, close Office apps and allow time for the replacement process to complete. On business machines, follow your organization’s deployment policy rather than running a consumer installer independently. Administrators should use standard tooling such as Intune, Configuration Manager, or the Office Deployment Tool so the transition is logged, repeatable, and aligned with update channel policy.

Recommended timeline

Do not treat December 2026 as a reason to wait. Feature updates already stopped for this installation type in October 2025, so affected systems are already on a less capable servicing path. For personal PCs, check and migrate during normal maintenance. For organizations, inventory devices now, identify any Store-based Microsoft 365 Apps, test the replacement workflow, and set a completion target comfortably ahead of the security deadline.

The key takeaway is that this is a supportability issue, not a productivity crisis. Your documents and Microsoft 365 account are not the problem. The installation channel is. Once the apps are on Click-to-Run, Windows users should continue receiving Office updates through the servicing model Microsoft is prioritizing for modern Microsoft 365 features and enterprise control.

Source: Windows Latest