Microsoft has released build version 26311 as part of the Windows Server Insider Program for Windows Server 2025. This build does not introduce new functionalities but builds on the previous build 26304. It includes Windows Defender Application Control for Business (WDAC), which enhances security by allowing only authorized software to operate. WDAC can be managed through PowerShell cmdlets and is supported by Microsoft's OSconfig security configuration platform. Additionally, build 26311 features the Windows Server 2025 Security Baseline Preview, enabling administrators to configure security settings based on a recommended posture derived from over 350 preconfigured Windows security settings. A default policy is available for installation via OSconfig and PowerShell cmdlets. The build is available for download, with a lifecycle extending until September 15, 2025.