Hi Sharath,
the problem is that PO doesn't know the root certificate of the certificate the Success Factor presents.
This is either due to your Java version being to old so that the root certificate is unknown or due to a https capable proxy in between PO and Success Factor.
Open the Success Factor homepage in your browser download the root certificate and add it to the trusted certificate store in PO. Then PO should accept the certificate presented by Success Factor.
If you're behind a https capable proxy be aware that installing this certificate in the trusted certificate store means that all endpoints that are routed through the proxy will now be accepted by PO. This could lead to potential security problems. So if it is possible in any way the preferred way would be to bypass the proxy for connections to Success Factor.
Best regards,
Frank
