JBoss.orgCommunity Documentation
To specify the initial Organization configuration, the content of your extension.war in /WEB-INF/conf/organization/organization-configuration.xml should be edited. This file uses the portal XML configuration schema. It lists several configuration plugins.
The plugin of org.exoplatform.services.organization.OrganizationDatabaseInitializer type is used to specify a list of membership types, groups and users to be created.