A Show password option or the ability to impersonate users from within the control panel would make administration a lot easier at times.
Passwords are encrypted securely as hashes. A hased pasword can not be shwon unencrypted. A function to impersonate exists is the controlpanel for a long time now. see login as button in the client and reseler lists.
Thanks. I meant impersonate specifically for webmail. I guess there is always the impersonate plugin for roundcube, which I use.