It is possible for any user, even users with an administrative account, to be locked out of a server configuration when the number of retries with the wrong password has been exceeded. The lockout period for the main administrative account (Administrator) is 24 hours. However, you can unlock the administrative account before the 24 hours have elapsed by using the following procedure:
starteamserver -start StarClient -fg
The configuration name specification is case-sensitive with the command line. The command prompt must be left open until the server configuration is shut down.