Hi Rajkumar,
There are a couple of ways to do this.
1) In the /siteminder/install_config_info/ path, you should find a version file. The name format for the Policy Server for example is ca-ps-version.info. The Web Agent name is ca-wa-version.info.
ProductName=CA Single Sign-On Policy Server
FullVersion=12.80.0.1761
Location=C:\Program Files\CA\siteminder
2) You can also check the main component logs, example again for the Policy Server, this is usually named smps.log. Upon startup it will list out an info line with the version:
[INFO][sm-Server-03550] Version: 12.8; Update: 00.00; Build: 1761; CR: 00;
3) A third option on the Policy Server is from command line. In the /siteminder/bin/ path, there is a Version command. Sourcing the environment variables and running the command will output the build #s.
C:\Users\Administrator>version
[Version - Version 12.8.0000.1761]
There are additional ways as well, but the ones above should be adequate in most cases.
Hope this helps!