Open Distro for Elasticsearch ships with an advanced security plugin. The plugin comes pre-configured with a number of different users and default passwords for them – of course, you will want to change those defaults! Passwords for some of the preconfigured users—kibanaro, logstash, readall, and snapshotrestore—are available to change in the Security UI in Kibana. The admin and kibanaserver users are set to read-only, and must be changed in the configuration files.
This is a companion discussion topic for the original entry at https://opendistro.github.io/for-elasticsearch/blog/open%20distro%20for%20elasticsearch%20updates/2019/03/Change-your-Admin-Passwords-in-Open-Distro-for-Elasticsearch/