Locking a Preference
To lock a preference, use the following procedure:
1. From the context level at which you want to lock the preference value, select Set Preference from the right-click actions menu for the preference.
2. On the Set Preference window, select the Locked checkbox.
3. Click OK.
The preference is now locked at the current context level.
* 
Before locking a preference value at the site or organization level, it is recommended that you delete any existing child instances for that preference. For more information see Deleting Preference Child Instances.
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