System Manager can act as a Certificate Authority (CA) similar to VeriSign, Symantec or any other third-party CA. Many adopters, such as Communication Manager, Avaya Breeze® platform, and Presence use certificates issued by System Manager.

For fresh installations, all identity certificates, including SIP and HTTPS, are issued by the System Manager CA. These pre-installed certificates do not contain the complete set of attributes that some peer devices need to validate the certificate. To use these certificates, you must set the Common Name and Subject Alternate Name in the SIP and HTTP certificates.