It is possible to combine several forms of directories to connect to a platform: Cas, LDAP, OpenID, SAML... in order to simplify the management of users and rights. For example, a platform might use a central directory for basic user information and then use specific directories for additional information, such as access rights or professional profiles.
This approach reduces the number of directories to manage, which can simplify the administration of the platform. It also helps improve the consistency of user information because all information is stored in one place.