Microsoft 365 applications, including Outlook, Word, Excel, and PowerPoint, have faced significant crashing issues, particularly among users on Windows Server platforms. This problem emerged following an update to Version 2412 (Build 18324.20168) that primarily impacted users of Windows Server 2016 and 2019, with crashes occurring just seconds after launching the apps.
The crashes have been identified to happen approximately 15 seconds after the applications are opened. Microsoft traced the issue back to the introduction of the React Native framework in the update, which was meant to enhance application performance and features. Instead, it compromised application stability, affecting primarily users on specific Windows Server versions.
While the React Native framework aimed to improve user experience with faster load times and better performance, it seems to have introduced compatibility challenges for the desktop versions of Microsoft 365 apps. This mismatch has led to instability issues, undermining the benefits initially intended by its inclusion.
Microsoft has initiated several measures to address the crashing issues. For Windows Server 2016 users, a rollback to Version 2411 (Build 18227.20162) is available, which can be executed via commands in an elevated Command Prompt. Users are also encouraged to disable automatic updates to prevent reverting to the unstable version until a permanent fix can be released.
For users on Windows Server 2019 experiencing crashes, Microsoft has provided emergency out-of-band updates. Administrators can download these from the Microsoft Update Catalog. Other recommended actions include reverting to earlier stable versions, adjusting power management settings, and optimizing memory usage for virtual environments to alleviate resource-related stability issues.
This incident highlights a broader trend of issues with Microsoft 365, including a recent Multi-Factor Authentication outage that complicated access for users. Additionally, Microsoft plans to phase out support for Microsoft 365 apps on Windows 10 by October 14, 2025, urging users to upgrade to Windows 11, though many struggle with hardware compatibility.
Microsoft is actively working to resolve the instability caused by the React Native framework’s integration. Users should follow the outlined mitigation strategies while keeping an eye on Microsoft’s updates for a more comprehensive solution to the crashing issues. A permanent resolution addressing both the crashes and the underlying instability from the update is anticipated in the near future.
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