automatically add attributes for new People users

[maurizio.marini at cost.it (Maurizio Marini)]

Hi all,
sorry for very newbie question?
i want add shadow attribute to all users;
i am creating users adding them to ou=People

i add posix schema as in 
http://directory.fedoraproject.org/wiki/Howto:Posix

now i add a new user; 
click on Add Value
click on shadowAccount
click on Add Attribute
multiselection for
shadowexpire...shadowwaring
click on Ok


now i can input values for these attributes.
Question is:
i can make this permanent for all next users i will add from now?
can i setup that all new users added to ou=person will have shadowaccount 
value and all shadow attributes automatically?
TIA
	Maurizio