You can set the user preferences in the Preferences page for any of the administrative management utilities. Each user preference has a default value that is implemented until an alternative value is set. In directory hierarchies, the preference values are inherited from higher level objects. However, the preference values set at the user object level override any values inherited from other objects in the directory.
You can restrict users from setting or modifying the preferences.
Launch the Administrative Management utility (SLManager or MMC snap-ins).
Click Preference.
Locate the setting you want to change and specify the appropriate value in the Value column.
Click OK.