I'm not aware of an imanager solution, but you should be able to view the attribute "pwdchangedtime" with nlist:
NLIST user show pwdchangedtime
(add /r /c /s to search continuous from [root] through all subcontainers)
Otoh, while that attribute is present in our production tree, it may very well be that it was added by Nmas or Identity manager. If the pwdchanged attribute is not present you could find the password change time by substracting "password expiration time" from "password expiration interval"
in iManager you can build your own custom plugins with Plugin studio, where you can accomplish above tasks:
http://www.novell.com/coolsolutions/feature/5797.htmlAnd of course there are the JRB utilities: PWDEXP
http://www.jrbsoftware.com/jrbutils_nw/utils/ptor/Hope that helps...