Step 5: Establish an HCM database.

This step does not apply to Certificate-based Web Express Logon or i5/OS or OS/400 environments that support Kerberos authentication. An HCM database is required for all other environments discussed in this document.
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This document does not provide details about how to establish an HCM database. .
An HCM is a back-end repository that associates users' network IDs to their host IDs. The CMS queries this repository during the logon process. Web Express Logon supports the following two types of HCM databases:

Another possibility for a repository is an LDAP directory. However, using LDAP as your HCM database requires you to write your own plug-in. For more information, refer to Customizing Web Express Logon.