Naveen,
The following is supported:
IIS 8.5 on W2012-R2: 12.52-SP1-CR02+ Agent12.51-CR6+ Agent
IIS 8 on W2012(no R2): 12.52+ Agent, 12.51-CR3+, 12.0-SP3-Special NIN that must be requested via a support case
Here are the platform support matrices:
12.0: support.ca.com/phpdocs/7/5262/5262_12sp2_sp3_PSM.pdf
12.51: support.ca.com/phpdocs/7/5262/5262_1251_PSM.pdf
12.52: support.ca.com/phpdocs/7/5262/5262_SiteMinder_12_52_SP1_Platform_Support.pdf
*Note that we support no version of IIS 8.0 on W21012-R2.
If you are using IIS 8.0 on W2012 or IIS 8.5 on W2012-R2 it is recommended that you use 12.52 as it is the newest version. While SiteMinder 12.0 will be End-of-Serviced on July 15, 2016 the 12.0 agents will continue to be supported, however there will be no new certifications, only security fixes. Here is the end of service notice:
End of Service Announcement for CA SiteMinder r12.0,CA SiteMinder Federation r12.0
Regards,
Sandy