To configure SSO in Prisma Cloud, the required fields are 'Identity Provider Issuer' and 'Certificate'. The 'Identity Provider Issuer' identifies the entity that provides the SSO credentials, while the 'Certificate' is needed to establish a secure communication with the identity provider. Other fields like 'Prisma Cloud Access SAML URL' and 'Identity Provider Logout URL' are optional and not necessarily required for the basic configuration.