Following the release of Windows 10 20H1 build 18985 last week, Microsoft is following up by flighting the Windows Server vNext Insider Preview Build 18985 and the Windows 10 SDK preview build 18985 today. The new Windows Server build includes no new features (just like the previous release), and you can get it from the Windows Server Insider Preview download page.
The new SDK also doesn’t bring any new features except some under the hood API changes. As usual, you can download this new Preview SDK from the developer section of Microsoft's Windows Insider website.
We were hoping to get a new Windows 10 20H1 build ahead of the first 20H1 Bug Bash, but that's apparently not happening. The Bug Bash will run from September 25th to Oct 2nd, and those of you interested in participating can get ready to check out new quests in the Windows 10 Feedback Hub.