Enterprise Single Sign-On (ESSO) 8.06 SP4 is compatible with:
Windows Server 2012 (for the controller) and the previous versions listed in the release notes, Enterprise Single Sign-On 8.0.6 – Release Notes
MS SQL server is supported from 2005 onwards (including 2008, 2012), in both 32 and 64 bit versions (for the audit DB).
For the latest release, ESSO 8.0.6 SP4, please attached for the release notes. These are also available in the Documents folder of the download itself.