Microsoft has unveiled the latest build of Windows Server 2025, designated as build 26334, now available for Windows Insiders. This release marks the final update for the year, with the next anticipated in January 2024. The new build encompasses both the Desktop Experience and Server Core installation options for the Datacenter and Standard editions, alongside the Annual Channel for Container Host and Azure Edition, which is intended for virtual machine evaluation only. Users are reminded that the branding remains as Windows Server 2025 in this preview, and any issues reported should reference Windows Server vNext preview. Those who have enrolled in Server Flighting will receive this build automatically.
New Features in Windows Server 2025 Build 26334
Among the noteworthy enhancements introduced in this build is the Windows Defender Application Control for Business (WDAC). This innovative security feature serves as a software-based layer that minimizes the attack surface by enforcing a specific list of permitted software. The default policy, defined by Microsoft, can be easily applied to the server using PowerShell cmdlets, supported by the new security configuration platform known as OSconfig. For further details, users can explore the Windows Defender Application Control for Business section on the Microsoft Community Hub.
Additionally, the Windows Admin Center (WAC) has been made more accessible. Starting with build 26252, preview customers can download and install WAC directly from the Windows Server Desktop. The in-OS application simplifies the process by managing the download and guiding users through the installation steps. It is important to note that this feature is available only for those running a desktop version of Windows Server Datacenter or Standard preview.
Known Issues
As with any software release, there are some known issues to be aware of. One such issue pertains to the Flighting label, which may mistakenly reference Windows 11. However, users can rest assured that selecting this package will indeed install the Windows Server update. Microsoft has indicated that this labeling issue will be rectified in a future release.
Windows Server build 26334 is valid until September 15, 2025, and users can install it using the following keys:
- Server Standard: MFY9F-XBN2F-TYFMP-CCV49-RMYVH
- Datacenter: 2KNJJ-33Y9H-2GXGX-KMQWH-G6H67
- Azure Edition: No key is required
For a comprehensive overview, users can access the full release notes for Windows Server 2025 build 26334.
