If a Linux server is hosting more than one OpenText eDirectory, each OpenText eDirectory instance typically has its own NICI directory setup. If you upgrade one instance of OpenText eDirectory to 9.0 or later, you will need to upgrade all instances because OpenText eDirectory 8.x will not work correctly using NICI 3.x.
It is recommended to run each instance of OpenText eDirectory on the same host with different user IDs to separate their cryptographic materials using the host system’s security mechanisms. NICI does not require a special user to run, except for installation, when a privileged user who can install setuid programs must install NICI (a one-time operation).