Managing Users and Groups with Workgroup Manager
If you choose not to manage accounts using Xsan Admin (for example, if you have
an existing directory of user and group accounts), use the appropriate directory
management tool to add or delete accounts.
For example, if you have an existing Open Directory server, you can use Workgroup
Manager in Mac OS X Server to manage user and group accounts and System
Preferences > Accounts > Login Options > Network Account Server (or Directory
Utility in Mac OS X v10.5) to bind SAN computers to that directory. For details, see the
Mac OS X Server documentation suite.