Install root certificates
Microsoft Entourage uses a root certificate (also called an anchor certificate) to verify the authenticity of all certificates you use. Macintosh computers come with a set of standard root certificates that are trusted, but you might need to install additional root certificates to verify certificates that are issued by nonstandard CAs, such as corporations or universities. This type of root certificate is an untrusted, self-signed certification authority (CA) certificate that identifies a CA and its public key, and is used to verify other certificates that are issued by the same CA. The root is stored in a secure location on your computer.
To install a root certificate on your computer, it must be in base-64 format (for Mac OS 10.2.8 and later), and you must have administrator privileges. If the root certificate is not in the correct format, you can use the Microsoft Cert Manager (located in the Applications/Microsoft Office 2004/Office folder) to convert it. To open the Microsoft Cert manager, double-click Microsoft Office 2004/Office/Microsoft Cert Manager.
How you install a root certificate depends on the Mac OS version you have. If you have a version other than the ones listed here, check the documentation that came with your computer for information on how to install a root certificate. Always restart Microsoft Entourage after installing new root certificates.
To install a root certificate on Mac OS 10.2.8
1. Copy the Privacy Enhanced Mail (PEM) (base-64) formatted root certificate to your computer's desktop.
2. In Terminal, type the following:
$ cd ~/Desktop
$ cp /System/Library/Keychains/X509Anchors ~/Library/Keychains
$ certtool i <filename_of_certificate> k=X509Anchors
$ sudo cp ~/Library/Keychains/X509Anchors /System/Library/Keychains/
<Enter the root password
