Hi Mithun
Thanks but this doesn't help.
Link1: this is not related to a trusted certificate. This only works for untrusted self signed certificates if I unterstand this right.
Link2: as you can see at the bottom of the article, this is not a solution for trusted certificates --> Note: if you see a warning that the site is untrusted, this is expected. This article describes enabling SSL using a self-signed (untrusted) certificate. As long as you leave the "Verify certificate..." option unchecked (as described in 4e above), this is not an issue.
Link3: same information as Link1... unfortunately no solution.
Link4: as you can, see this person there is requesting for the same, but unfortunately they do not have any solution...
But thanks for your help...
@Symantec: In SEP11 there was a really elegant way to implement a trusted certificate from a external CA (f.e. thawte) but it looks that very many persons are facing the problem that there is no direct way how to implement this in SEP12 (or maybe I we can't find the propper information). Since this is a relevant security issue, this has to be fixed in SEP12. It has to have a way how to implement a trusted certificate. Thanks for any further advice if there is maybe a workarround or propper WHITEPAPERS otherwise please implement this in the next MP.