MSFT for Windows 2012, Windows 2008 R2, Windows 2008, and Windows 2003 are supported. onQ supports iSCSI connections to a storage device in a SAN environment.

onQ supports an active/passive arrangement, which is sometimes referred to as a Single Copy Cluster (SCC). SCC is one of four high availability options of Exchange 2007. Exchange 2010 does not support SCC. With Exchange, only the mailbox role is supported in a cluster environment. Therefore, cluster support for Exchange is limited to Exchange 2003 and 2007. SQL 2008 and 2008 R2 also support SCC.