Hello,
If this option is enabled in the user defaults it will be enabled for all new users you create. There are two places where this can be set. ( see image below ) The one on the left is for the server. The one listed under the domain is domain specific and will override the system level settings.
I hope this helps.
Thank you
Tony Scholz
System/Network Administrator
SmarterTools Inc.
www.smartertools.com