How do I change the certificate of a Shibboleth service provider?

[CHLOE SOWERS (BLOOMBERG/ 731 LEXIN)]

Naaa, there is absolutely nothing in Googledom referencing that error. That is why I came here.

http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=ERRR+Shibboleth+exception+resolving+SAML+artifact+CURLSOAPTransport+failed+while+contacting+SOAP+endpoint+error+SSL+routines+SSL3_READ_BYTES+tlsv1+alert+unknown+ca

Would you happen to know which setting for Apache controls that?