If a user account has been locked after too many failed log-in attempts, an ADMINISTRATOR can unlock it from the Admin panel.
First, go to the Admin > User Administration page, and find the username whose account you would like to unlock.
After clicking the username link, you will be brought to the specific User Details page. From this page, click the "Unlock" button at the top right. This unlocks this user's account, and he/she can log in using his/her old password. However, you can also reset users' passwords from this page (although this is not necessary; users can still log in with their old password once an account has been unloacked).
If all admins are locked out of the system, please contact MCA Suite.
Note: MCA Suite will lock your account after 5 failed log-in attempts.