https://docs.microsoft.com/ja-jp/windows-server/administration/openssh/openssh_install_firstuse
((((；ﾟДﾟ)))))))
Add-WindowsCapability : Add-WindowsCapability failed. Error code = 0x800f0950 #2074
https://github.com/MicrosoftDocs/windowsserverdocs/issues/2074
gpedit.msc (Group Policy) -> Computer Configuration -> Admin. Templates -> Windows Components -> Windows Update -> Specify intranet Microsoft update service location -> Disabled seemed to help me with Win2019.
ヽ(；´Д｀)ﾉ
