OES 2015 SP1: SLES 11 SP4
Active Directory: Active Directory running on Windows 2008, Windows 2008 R2, Windows 2012, and Windows 2012 R2. Beginning with OES 2015 SP1 both single and multiple forests are supported.
OES File Access Rights Management Utility (NFARM): Windows 10, Windows 8.1, Windows 8, Windows 7 SP1, Windows 7, Windows 2012 R2, Windows 2012, Windows 2008 R2, and Windows 2008.
OES User Rights Map Utility (NURM): Any web browser that supports, HTML5, CSS3, and Java script.