Running ZCS 4.5.5 and I have had reported from a user that they are unable to log in.
Checking acctount details, the account is locked as per the configuration for security (5 failed attempts within 1hr locks account for 1hr).
Problem is, the account has not reset. It has been locked for over 24hrs.
Also note that there is a time difference between Zimbra timestamps and system time that is NOT equal to timezone offset.
zmprov ga <user>
zimbraPrefTimeZoneId: (GMT+10.00) Canberra / Melbourne / Sydney
2007-07-22 19:58:15,000 INFO [http-80-Processor97] [ua=ZimbraWebClient - IE6 (Win);ip=188.8.131.52;] security - cmd=Auth; account=<user>@pakenhamses.com.au; error=account lockout due to too many failed logins;