What is Third Party SSL Certificate?
Exchange Server supports various SSL Certificates issued by the different vendors. But your phone may not have all the root certificates installed on the device. As of now, only a few vendors like Verisign are supported. The BREW phones do not allow you to install root certificates, as is the case with Windows Mobile phones. Failure to find a root certificate results in RemoSync displaying Error 1295. Accepting the Third Party SSL Certificate overcomes this drawback by passing the SSL requirement.