Mac OS X, Managed Client: Users with low UIDs do not appear in the login window

Mac OS X normally creates user accounts with UIDs of 501 and higher. Under some circumstances, you may have users with lower UIDs. Examples include when:

• Binding to an Open Directory server, such as LDAP or NIS
• Importing users
• Changing UIDs with administration tools

An alternate scenario in which some users may not appear is when you have more than 500 LDAP users.