Notification Processing on the Intranet

My client requires Notifications from general users to be created from within their Intranet for security purposes. The IMG node "Notification Processing on the Intranet" gives my the lead on the functional solution and I understand that the ITS is now integrated within ECC6.

So in essence I click on a URL in the Intranet and up pops a HTML representation of IQS21.

What program does clicking on the URL call to make the magic happen?