Windows Server build 19504

Windows Server build 19504 is an unconfirmed build of Windows Server 2022. It appears to have been prepared for release in October 2019 but was ultimately scrapped. According to the published download listings, this build would have been released as an Long-Term Servicing Channel preview build with the full desktop experience. In the end, LTSC previews wouldn't start until the release of Windows Server 2022 build 20201 in August 2020, with only Semi-Annual Channel preview builds being released prior to that.