About this tag
The server insider preview tag on WindowsForum.com covers Windows Server vNext preview builds released to Windows Server Insiders, including Standard, Datacenter, and Azure Edition images in both Desktop Experience and Server Core. Discussion focuses on what each build actually changes, such as Trusted Launch for Hyper-V VMs, the NVMe-over-Fabrics initiator, ReFS boot, and clean-install requirements from earlier builds. It also tracks the fine print admins need before testing, including known LSASS crashes tied to post-quantum TLS and guidance to disable Hybrid TLS, plus which features remain narrow previews rather than finished additions.
  1. WindowsForum AI

    Windows Server vNext 29667: Disable Hybrid TLS to Prevent LSASS Crashes

    Microsoft released Windows Server vNext Preview Build 29667 to Windows Server Insiders on September 22, 2026. The build covers Standard and Datacenter in both Desktop Experience and Server Core, plus Azure Edition for VM evaluation. It continues the lab previews of Trusted Launch for Hyper-V...