Microsoft Force-Upgrades Windows 11 Home, Pro PCs to 25H2

Microsoft has begun mandatorily upgrading all Windows 11 Home and Pro PCs to version 25H2, a move that affects systems not managed by IT departments and extends their support by 12 months [1]. This forced rollout prepares systems for the upcoming Windows 11 26H2 release, which shares a common codebase with 25H2 and requires only a small enablement package for new features [1].

Mandatory Windows 11 Update and Outlook Improvements

Microsoft is now rolling out Windows 11 25H2 to all compatible PCs, including those running older versions like 23H2, which has been unsupported since November 2025 [1]. This upgrade, which was previously optional, is now being delivered through a machine learning-based intelligent rollout to ensure all home user PCs receive it, regardless of user consent [1]. The update is expected to take only a few minutes and require a single restart, as 25H2 shares its code base with the prior 24H2 version [1].

In a separate update, Microsoft's new Outlook app for Windows 11 has improved its offline support, allowing users to add attachments to emails without an internet connection, with messages automatically sending once reconnected [2]. This feature, which Microsoft has been testing since October 2025, addresses a limitation for users who frequently work offline [2]. Despite these improvements, many users still prefer the classic Outlook app or the web version over the new repackaged web app [2].

Microsoft 365 Copilot Auto-Installation

Microsoft is also set to automatically install the Microsoft 365 Copilot app on eligible Windows PCs running Microsoft 365 desktop apps between mid-June and mid-July [3]. This rollout, confirmed in an update to Microsoft's admin portal, means the Copilot app will appear by default, requiring administrators to "opt out" if they do not want it on devices within their organization [3]. Users in the European Economic Area are exempt from this automatic installation [3].

The Copilot app's installation is not via the Windows Store but through the Microsoft 365 Apps updater [3]. Microsoft has also been pushing Copilot entry points across various Office applications, including Word, Excel, PowerPoint, Outlook, and Teams [3]. While users can disable Copilot features within individual Office apps or by adjusting privacy settings, these methods may not fully remove the AI functionality [3]. For personal and family subscriptions, Microsoft has offered "Classic" plans without Copilot in some regions, which users can access by canceling their current subscription and checking for alternative plans [3].

What to watch

• Monitor the rollout of Windows 11 25H2 to ensure all Home and Pro PCs receive the update and to observe any user feedback regarding the mandatory nature of the upgrade [1].
• Observe the adoption rates of the new Outlook app following its improved offline capabilities, and whether these changes shift user preference from the classic or web versions [2].
• Track the automatic installation of the Microsoft 365 Copilot app on eligible Windows devices and the effectiveness of opt-out mechanisms for organizations and individual users [3].

The mandatory updates across Windows 11 and Microsoft 365 reflect Microsoft's strategy to standardize its user base on newer versions and integrate AI features more deeply into its ecosystem, potentially streamlining future updates but also raising questions about user control over software installations [1, 3].