yup you still can use vista as long as you get the server 2009 updates
Windows Server 2009?
yes theres updates for windows server 2009 that if you look up will for for win vista you just need the sha2 update and some root certificates
But it’s not called Windows Server 2009. It’s called Windows Server 2008 (Vista Server) or Windows Server 2008 R2 (7 Server).