Microsoft has yet to release its weekly Windows 10 build for Insiders in the Dev channel, but the rest of the Insider program is still moving along as usual. As such, build 20165 of Windows Server is now available for Insiders to download.
If you've been following along with the development of Windows Server builds, you'll notice there haven't been any changelogs shared anywhere, so it's unclear what changes have been made so far. This time around, nothing has changed, and it's still not known what you can expect to find in this build. Regardless, you can download it from the Windows Server Insider Preview page, along with all the necessary matching files like language packs and a VHDX file.
In addition to Windows Server, the Windows 10 SDK preview is also being updated to build 20165, along with matching builds of the Assessment and Development Kit (ADK) and Windows Driver Kit (WDK). Just like Windows Server, a changelog for this build is nowhere to be seen, but you can download the SDK preview from there, the ADK from here, and the WDK from here.
Last week's Windows 10 build arrived a little later than usual, but it was still released on Wednesday, so it's certainly possible the same will happen today. It will likely carry the same build number as the Windows Server and SDK builds, as we've been seeing in recent weeks.