And a stupid, beginner's mistake: not using the "Search" before posting.... really sorry about this
After reading above---^^^ run the pam_tally2 as root:
sudo pam_tally2 --reset and the counter was reseted running in omv-firstaid:
@Moderators: Feel free to delete or leave the thread if you think it's beneficial to anyone,
1st issue posted
Never had configured the mail notifications, but finally decided to.
Started receiving a info about "Locked users overview" and that to reset the counter, to use omv-firstaid.
Fired the terminal and launched it (I don't recall ever using it, nice tool to start discovering with EXTREME CAUTION).
Scrolled down to #4 and clicked "OK" but it errored out.
Tried with sudo omv-firstaid and the same issue.
If any info more is helpfull, please, let me know.
Thank you in advance