how to unlock user ID in solaris?

I only able to lock user ID with passwd -l username

It seems there is no option for me to unlock ID in solaris?
Is there any command as below?

passwd -u username

Appreciate someome can share with me the way to do it.

man passwd

'passwd -df username' will unlock the user-id, and force the user to enter a new password at next login

QED: Quite Easily Done