Microsoft server software and supported virtualization environments

New Microsoft Licensing and Support Eases Path to Virtualization

https://www.microsoft.com/presspass/press/2008/aug08/08-19EasyPathPR.mspx

Microsoft server software and supported virtualization environments

https://support.microsoft.com/kb/957006

Support partners for non-Microsoft hardware virtualization software

https://support.microsoft.com/kb/944987/