The Fully Qualified Domain Name (FQDN) address of the Cisco Unity Connection server, server host name or FQDN.
To implement the Unity Connection SRSV High Availability functionality, you must mention a common DNS A Record for both publisher and subscriber for central Unity Connection server.
This Common DNS A record for unity connection Cluster should also be a part of Central Unity connection Certificate as “Subject Alternate Name” or you can also enable Ignore Certificate Error feature in Unity Connection SRSV.
For more information on “Subject Alternate Name” see Security Guide for Cisco Unity Connection Release 10.x at http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/10x/security/guide/10xcucsecx/10xcucsec065.html.
For more information on ignoring certificate error, see http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/10x/srsv/guide/10xcucsrsvx/10xcucsrsv120.html#wp1076665.
For information on managing SAN Certificates, see http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/10x/os_administration/guide/10xcucosagx/10xcucosag060.html#pgfId-1053402.