If a system administrator user account is disabled due to too many failed login attempts, you may find yourself in a situation where you cannot authenticate to the WS_FTP Server Manager. In this case, you can use iftpaddu.exe command line utility to enable the user account.
To enable a disabled system administrator account using the command line utility:
cmd.exeand click OK. The command line window opens.
iftpaddu.exe -mod -h <host name> -u <user name> +active, where
<user name>is the name of the user you want to restore and
<host name>is the name of the host to which the user belongs.