User registries may vary from one another along many dimensions. WebSphere version 7 supports four types of user registry:
With the possibility of using multiple security domains, it is also possible to use several user registries within a cell. A specific type of registry would have to be mapped to a given security domain. It is therefore possible to have shared user registries between two or more security domains.
Best practice: use stand-alone LDAP
Most organizations use LDAP as the user registry. This is because many IT components outside of a WebSphere environment that require user authentication already make use of LDAP-based ...