Hi Sanjay,
I have had trouble with that before, The zerog installer used by SSO, would leave a file :
.com.zerog.registry.xml in etc if it was installed by root.
Or the install users home directory if installed by a non-root user.
You could check to see if either of those files exist.
Cheers - Mark
----
Mark O'Donohue
Snr Principal Support Engineer - Global Customer Success