Question : updating entourage anywhere equivalent certificate

We have a new mail server, i was just in the process of updating all remote computers with the new certificate for outlook anywhere to work over HTTP. All went successfully, i now have to do an iMac (which i am not very familiar with) so i just have to do the same process for this iMac (entourage) which i did with the PCs (adding new certificate). Please advise.

Answer : updating entourage anywhere equivalent certificate

Export the certificate in ".cer" format and then drag and drop it on the Keychain Access Utility found on the Mac at /Applications/Utilities