Ankush,
Please provide the commands that you ran to test this as the content-type, HTTP method, and other URL options are important to make this work.
Here are some examples using Restman:
Create a new trusted certificate:
HTTP Method: Post
URI: /restman/1.0/trustedCertificates
Header: Content-type=application/xml
Payload sample: Attached post_create_certificate.xml file
Update a trusted certificate:
HTTP Method: Put
URI: /restman/1.0/trustedCertificates/{id} (Sample aligned to the attached file: 69e22f4c815a7c4aa5910ecfbbdc4dd9)
Header: Content-type=application/xml
Payload sample: Attached put_update_certificate.xml file
Sincerely,
Stephen Hughes
Director, CA Support