Or wait until the lockout duration that is set on the system passes and the accounts should be accessible again with the proper password ! (IIRC by default it is 30 minutes )
Because of security reqmts in our installation, locked out accts have to cleared by an admin. The built-in Administrator account had been disabled, so that avenue was closed to us. See my response to Saga Lout for the solution I eventually came up with. Thanks for you response.