Not really, there is no "official" CA. Its either supported out of the box or its not, and that is completely up to the device or software vendor. I got my cert from startssl.com, and it wasn't included by Palm. I went to their website, downloaded the root cert, and everything worked after that.
Originally Posted by mrsyeltzin
If you can view a site using the same cert (like webmail) on your PC in a web browser without getting an SSL error, then both the cert and the root/intermediate cert ARE on your computer already, and you don't need help from your IT people. From IE, go to Internet Options, click on the "Content" tab, and click on the "Certificates" button in the middle of the window. Find the ones you need (should be under Intermediate Certification Authorities and/or
Trusted Root Certification Authorities), and click export. That should be what you need.
You may also want to try importing the actual cert too. The phone should do this on its own, but if you just want to get it working, it can't hurt.