"Events and Messages : Proactive" - Deny access to the server outside specified hours

Event in zFTPServer:

BeforeConnect

Script in zFTPServer:

C:\Scripts\OfficeHours.bat

Error message in zFTPServer:

You're not allowed to login outside office hours.

Contents of file "C:\Scripts\OfficeHours.bat":

@echo off

rem Extract current hour
for /f "tokens=1-2 delims=: " %%a in ('time/t') do (
set hour=%%a
set minute=%%b
)

rem Deny access outside office hours
if /I %hour% LSS 8 exit 1
if /I %hour% GEQ 18 exit 1