About Security Password
During Unity Connection installation, you specify a security password that is not associated with any user. The password has two purposes:
When a Unity Connection cluster is configured, the two servers in a cluster use the security password to authenticate with one another before replicating data. If you change the security password on one server in a cluster, you must also change the password on the other server, or the two servers cannnot replicate data or messages.
Regardless of whether a cluster is configured, the security password is used as the encryption key for the Disaster Recovery System. If you back up a Unity Connection server, change the security password, and then try to restore data from the backup, you must enter the security password that was in effect when you backed up the server. (If the current security password matches the security password with which the backup was made, you do not need to specify the password to restore data.)
To change the security password, use the set password user CLI command. For more information, including the sequence in which you change the password on the servers in a cluster, see the applicable version of the Command Line Interface Reference Guide for Cisco Unified Communications Solutions Release 14 at http://www.cisco.com/c/en/us/support/unified-communications/unity-connection/products-maintenance-guides-list.html.