Microsoft Hyper-V Server has a new composition, and as a result we are finding new issues that are delaying the release. We are working through solutions and apologize again for the delay. If you installed the original RTM version when it was available, you may not be offered updates via Windows update. Microsoft recommends installing the latest cumulative update (KB4489899) from the Microsoft Update Catalog. Microsoft remains absolutely committed to shipping Hyper-V Server – thanks to our wonderful community for your patience.