Windows Server 2019 Insider Preview Build 17738 released.

Host Device Access for Containers

We’re adding the capability to assign simple buses to process-isolated Windows Server containers. Applications running in containers that need to talk over SPI, I2C, GPIO, and UART/COM will now be able to do so.

SDN High Performance Gateways

Organizations today deploy their applications across multiple clouds including on-premises private clouds, service provider clouds, and public clouds such as Azure. In such scenarios, enabling secure, high-performance connectivity across workloads in different clouds is essential. Windows Server 2019 brings huge SDN gateway performance improvements for these hybrid connectivity scenarios, with network throughput multiplying by up to 6x!!!

Available Content

  • Windows Server 2019 Preview is available in ISO format in 18 languages, and in VHDX format in English only. This build and all future pre-release builds will require use of activation keys during setup. The following keys allow for unlimited activations:
Datacenter Edition 6XBNX-4JQGW-QX6QG-74P76-72V67
Standard Edition MFY9F-XBN2F-TYFMP-CCV49-RMYVH
  • Windows Server vNext Semi-Annual Preview – The Server Core Edition is available in English only, in ISO or VHDX format. The images are pre-keyed – no need to enter a key during setup.
  • Microsoft Hyper-V Server Windows Admin Center Preview 1808 

Symbols are available on the public symbol server.

This build will expire December 14th, 2018.

Known Issues

  • [NEW] Notepad may crash or display an empty pane when a user selects File > Open.
  • [NEW] Authentication that uses Public Key Cryptography User-to-User (PKU2U) to access an SMB volume can result in an error, STATUS_LOGON_FAILURE, due to an invalid private key in the certificate for a cluster-created user account (CSUSR) on each cluster node. This issue can cause cross-cluster migration in cluster sets to fail, as well as possibly cause global namespace mappings to fail, leading to virtual machines being unable to access storage.
  • [NEW] The Base Filtering Engine service may consume an inordinate amount of memory after starting and stopping thousands of containers.
  • [NEW] The operating system has an unnecessary utility account for Windows Defender Application Guard.
  • The Virtual Hard Disk Miniport Driver (Vhdmp.sys) may experience a bug check, SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (7e).
  • When a Windows Defender Application Guard container crashes, the resulting type of dump may be unexpected.
  • On a preview build of the operating system, Narrator is not available by default after installation. On an affected system, the audio service is disabled by default.
  • On recent preview builds, database applications might not be able to initialize a database and fail with a stack overflow or insufficient privileges when the database is located on an SMB volume.
  • Shielded VMs running Linux do not boot. The loader (LSVMLoad) waits for a passphrase for the boot partition.
  • Creating or modifying environment variables by using setx fails on a system running in a Nano Container (that is, Nano Server as a container image). On an affected system, setx requires a specific path in the registry, HKCU\Environment\, to exist by default. You can work around this issue by changing where the variable is stored in the registry, or you can add the expected registry path before executing setx commands. To specify that the variable be set for system-wide use in HKLM rather than in HKCU, the default, add the /M switch to a setx command. To instead add the expected registry path, run reg add HKCU\Environment before executing setx commands.