The majority of problems encountered initiate from users not being able to connect. This happens primarily at login. Check the following issues when troubleshooting account management:
Check the Directory Service binding. Is the client bound to the correct directory?
Is the Directory Server exported correctly?
Check the user, group, and computer list settings. Are the settings too restrictive? For example, is guest access denied and a new computer online?
Check the preferences by logging in as a similar user. This works best if most preferences are shared by the group.
Use the Inspector to view the raw preferences. It is especially useful if settings are set manually and copied into the user records. The Details functionality can also serve as a quick check for a set of preferences.