...
A security realm defines the mechanism for user authentication and authorization. FlexDeploy provides a default internal realm for users, which is based on FlexDeploy database tables for users and groups. FlexDeploy also supports LDAP and SSO based realms for authentication and authorization using an external directory server. You can define multiple LDAP security realms, or one SSO realm. To configure and view the realms, navigate to Realms from the menu or global search. FlexDeploy’s out-of-the-box realm can be utilized alongside external directory servers.
...
Drag and drop ordering of realms is supported to ensure that authentication checks are done in a particular order. If you define multiple realms, users are authenticated against each realm in the specified order until the first successful authentication occurs. Authentication will stop with the first successful authentication against any realm in the list.
...