Thanks Ivivanov,
I had not much time to explore it. So i removed the esxi host from Vcenter and the converter was working directly with ESXI Host. Conversion also finished properly. I again added esxi host to vcenter. But still i am unable to see SSL setting for any of the four hosts. Very strange?
In case if you can suggest something else then i will give it a try else we can close here.
Many thanks
Samod