Hi anbukamalesh,
From your description, “Certification” folder not there in \inetpub\wwwroot\_wmcs\, it seems that haven’t install Active Directory Rights Management services successfully. If that is the case, you need to remove the service and re-install the service.
Here is an article about how to install Active Directory Rights Management services for your reference:
https://technet.microsoft.com/en-us/library/ff625683(v=ws.10).aspx
Best Regards,
Lisa Chen
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