Exchange Server SBS 2003 & Pop Connector to Schedule less than 15min
You can set the polling interval so that polling occurs more frequently than every 15 minutes:
Add a Schedule (DWORD) “ScheduleAccelerator” entry to
“HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SmallBusinessServer\Network\POP3Connector”
To determine the actual polling interval: Divide the POP3 Scheduling interval (the value you have configured in the POP3-Connector GUI’s Scheduling tab)
by the value you set for the ScheduleAccelerator reg entry. For example, if you specify a 15-minute interval in the POP3-Connector GUI, and you set the ScheduleAccelerator value (Decimal) to 3, the POP3 Connector will poll every 5 minutes (15 divided by 3). If you set it to 5, the POP3 Connector will poll every 3 minutes.