How to get CSR file or Certificate

We are trying to import OAuth certificate into Oracle Financials Cloud ERP. We have the Public key, meta data URL but Fusion Apps is a legacy system and requires certificate. How can we get the certificate or CSR file ?

what kind of SSO are you trying to implement? As it’s Oracle, I’d assume it should be SAML probably, no? If yes, then you need SAML application in Okta, which will allow you to get metadata after you create it