You can use DSCC to perform this task. For information, see Directory Service Control Center Interface and the DSCC online help.
Stop the instance of Directory Proxy Server.
$ dpadm stop instance-path
Back up the instance of Directory Proxy Server.
$ dpadm backup instance-path archive-dir
The archive-dir directory is created by the backup command and must not exist before you run the command. This directory contains a backup of each of the configuration files and the certificates.