samba - Dec 2006 - Change existing accounts policy using pdbedit

Hi,

Running Samba version 3.0.22-13.18 on Suse 10.1

I have just converted our smbpasswd to a tdbsam passdb backend so I 
could use the pdbedit tool.  I created a new policy using the pdbedit 
tool and it works fine for new accounts however I am wondering is there 
any way in applying this policy to existing accounts?

Thanks
Gareth