Retrospect Virtual Competitive upgrade - Exchange Mailbox Addon (per mailbox). Type: Backup / Recovery, Software type: Upgrade, License term in years: 1 year(s). Windows operating systems supported: Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64,..., Server operating systems supported: Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2, Minimum processor: Intel. Platform: PC