I am unable to export the VM as OVF templates though i have installed client integration plugin. Any help will be appreciated.
The client is not activated on your browser so Web Client couldn't detect that.
Try to activate that.
You may need to clear the browser’s cache and go through below link for the more information which might be help to resolve such issue.
I have noticed Chrome, sometimes have random has issues with client integration plugin, try a different browser like Firefox.
Also if you have a large cache with Chrome this can cause issues, clear down your temp files.
I resolved a similar issue recently and posted my findings in Regarding Firefox revisions >= 39 and related 6.0 U3 Client Integration Plug-in issues . In summary, I ended up resolving my issues by using Firefox 52 ESR and by making sure that Firefox Options | Applications | vmware-csd is set to "Always ask". My problems were also related to exporting OVF templates, and this solution path made it possible for me to export an OVF template.