Click the following link to go to the WebSphere
Application Server V5.0 Information Center section covering local
operating system user registries.
A Local operating system (OS) user registry is not a centralized user
registry like LDAP. Do not use a Local OS user registry in a distributed
WebSphere Application Server environment, where application servers are
distributed across several host machines, because each machine has its own
user registry. There are exceptions, however; a Microsoft® Windows® domain
registry is a centralized registry.
The access-IDs taken from the user registry are used during authorization
checks. Since these IDs are typically unique identifiers, they vary from
machine to machine even if the exact users and passwords exist on each
machine.
The instructions on setting up the IBM Directory Server are in the IBM®
Redbooks® publication IBM WebSphere V5.0 Security, number
SG24-6573-00.
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