Global Junk Mail Settings are used to set junk mail preferences for all users within the enterprise.

Junk Mail Threshold:
        1)  From the enterprise preferences menu, select the Global Junk Mail Settings section. 

        2)  Select the Junk Mail Threshold you wish to enforce for all new users.
               (Note: To  change existing users junk mail settings click here )

        3)  Click on Save Changes to set the threshold level.

User Ability to Change Settings:
        1)  This setting allows the enterprise manager to decide whether or not to allow users to modify their own threshold levels.

        2)  To allow users to modify their own threshold, check the box next to Can set own Junk Mail threshold.
                 *** Applies to new users only.

        3)  To enforce this setting for existing users simply check the box to the left of the Force button and Save Changes. 
                 *** This will allow existing users the ability to manage their own threshold level if they previously could not.