SSP - User Lockout feature.
SSP -> Credentials -> User Store -> User Lockout Threshold setting
A user account is locked after a specified number of failed login
attempts. The number of failed login attempts allowed is defined by the
User Lockout Threshold setting and you can define how long a user is
locked out in the User Lockout Duration field.
This is an automatic locking and unlocking mechanism which is managed
by SSP on its own, however we would like to have a manual process in
place for this too. So that we have ability to view the locked
accounts and we should be able to unlock selected account manually and
in the manual option there will be no periodic locking. The unlocking
will be only managed via SSP UI manually by the administrator.