[sambalis]

Thank you all for your answers!

Originally Posted by King Kovifor

Passwords cannot be retrieved. They must be reset to be in use with vBulletin's encryption method. Inside of the ACP, you can do a mass e-mail by doing this: ACP -> Users -> Mass E-mail Members. Remind them to reset their password and link them to the lost password page.

I have already done this and the "comeback" percentage was 2%.
The basic reason for this is the complexity of that procedure, as seen in many replies I had from members thath couldnot complete this.!!

So if there is no solution, maybe it would be helpful a "password generator" :up: for members that either lost their passwords, or forgot, or were reset at any reason (including impex)!!!