JSI Tip 1856. SBS only downloads POP3 email, over your full-time link, in 15 minute intervals?

The 15 minutes is hard-coded.

You can workaround this limitation by configuring the POP3 connector to use the Router option.

Do not configure a Dial-up Networking connection when you use the Router option, use your existing full-time connection.

Once you do this, use the Schedule option to configure the POP3 downlooads.

NOTE: Don't input anything in the Router Trigger box.