A new Windows Server Insider Preview build is now available, the first new one in about three weeks after 17079 was released. Today's build is 17093, and while it coincides with the latest Windows 10 Fast ring build, there are no new front-facing features.
There are, however, a number of known issues to be aware of:
On builds 17088 and higher, after Server Core OS installation, the user is requested to set the password – when the user does so, an error message is presented “The remote procedure call failed”. The install will still accept the password as expected.
Upgrading a system to a preview build, starting with build 17088, may stall at 88% for 45 or more minutes before eventually being completed due to loading registry hives for each driver.
When BitLocker is enabled and a system is started, the system prompts the user for the BitLocker PIN. Upon providing the correct PIN the first time, the system says the PIN is incorrect; however, if the user presses Enter a second time, the PIN is accepted.
In‑place OS upgrade: BitLocker. Before performing an in-place OS upgrade, suspend (disable) BitLocker protection on any drives on the system. After the upgrade is complete, resume (re-enable) BitLocker protection.
In-place OS upgrade: Domain Controllers. During an in-place OS upgrade, Active Directory (AD) Domain Controllers (DC) might not be upgraded correctly. Back up any AD DCs before performing an in-place OS upgrade.
Using container images from Windows Insider Program on a Windows Server Core host will fail, and may crash the host. As a workaround, you can add isolation=hyperv when running or building the containers; for example: docker run -isolation=hyperv microsoft/nanoserver-insider.
When Hypervisor Code Integrity (HVCI) is enabled, a system may fail to start. On affected systems, firmware locates UEFI runtime services in memory described as Memory-Mapped I/O (MMIO).
Testing of the Windows core may fail because of a timeout while attempting to load the test libraries.
As with previous Windows Server Redstone 4 builds, you will not need a product key to activate it. It's included in the product, but it expires on July 2, 2018.
Windows Server build 17093 is available in both ISO and VHDX formats, and you can download it here.
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