Hi ​@Ajeesh_G - while this error typically points to a missing certificate issue, let us sort out authentication first. The reason you don't have to authenticate when accessing Collibra in your browser is likely because you're logged in automatically via company SSO. Could you please try to open the same endpoint that you're trying to reach from ONE desktop, in an incognito tab of the browser? If you get an error or a login page then your Collibra instance does expect requests to this URL to be authenticated. 

SSO login is not supported in ONE Desktop, and it's a best practice to have a dedicated system user for integration purposes, so I would recommend reaching out to your Collibra admin to adjust the security configuration. They would need to check that basic auth is allowed for your Collibra server, and create a user/password for the integration.

Please let me know how it goes!