Scroll-down and click View SAML setup instructions under SAML setup.
Copy the domain name and app id from Identity Provider Single Sign-On URL.
Replace ${yourOktaDomain} and ${yourAppID} in URL https://${yourOktaDomain}/app/${yourAppID}/sso/saml/metadata with the information copied in previous step.
Paste the formed metadata URL in MySonicWall application to setup external identity provider.