Microsoft has launched an updated version for Windows Server Insider program participants, numbered 26304, which includes significant enhancements such as the addition of Windows Defender Application Control for Business (WDAC) to enhance system security.
What are the latest updates and how do I get build 26304?
The latest version is offered in ISO and VHDX formats, only the Azure Edition Preview Datacenter version is available in English. Microsoft has also provided activation keys for the preview versions. This update will be valid until September 15, 2025.
The new version can be downloaded from the Microsoft website using the provided keys.
- Server Standard key: MFY9F-XBN2F-TYFMP-CCV49-RMYVH
- Datacenter code: 2KNJJ-33Y9H-2GXGX-KMQWH-G6H67
Below are the key updates in the news.
WDAC is a security feature for businesses provided by Windows Defender Application Control.
Windows Defender Application Control for Business is a new feature in the update that enhances server protection by limiting the software that can be run. This tool gives system administrators greater control over server applications, minimizing the threat of malware attacks.
An additional security measure is set up using PowerShell cmdlets through the OSconfig security platform, which includes a predefined “standard policy” from Microsoft to simplify its implementation on servers.
View of the Security Baseline for Windows Server 2025
The security baseline for Windows Server 2025 was implemented starting from build 26296 and is now accessible in build 26304. It includes more than 350 predefined configurations to enhance server security, enabling administrators to adhere to industry standards by adjusting settings accordingly.
The baseline is divided into three categories, depending on the server’s purpose.
- Domain Controller is abbreviated as DC.
- Server that is a member;
- Working Group member.
This perspective is suitable solely for test systems as some adjustments cannot be undone once implemented.
Enhancements to Server Flighting and Feedback Hub
Participants in the Server Flighting program will automatically get the new build, and Server Desktop users now have access to the Feedback Hub for direct communication with Microsoft. The app can be updated automatically or manually in the settings tab.
Some issues have already been identified
Version 26304, like all test builds, introduces certain issues that users need to be mindful of.
- The label may mistakenly mention Windows 11 instead of Windows Server during installation.
- The optional WinPE-Powershell component is not correctly installing Powershell on WinPE, leading to cmdlet failures.
- The construction includes occasional issues when upgrading from older versions like Windows Server 2019 and 2022.
- The event log service may stop working when saving records, necessitating a manual restart of the service.
Paraphrased: Origin