Do you add SSL Certificates into your Trusted Store?
Some customers add their SSL their SSL Certificates into their Trusted Store. If your organization does, then you may need to take action i.e. have your IT/Engineering team update your "Trusted Store" with the new SSL Certificate(s) as Oracle is replacing the RSA SSL certificates with ECC(Elliptic Curve Cryptography) certificates on May 9, 2022.
More information can be found in our product notice: https://community.oracle.com/topliners/discussion/4477960/eloqua-ssl-certificate-updates-may-2022