d-PIT have produced a quick upgrade guide for the BlackBerry Enterprise Server v4.1.x for Lotus Domino .

This guide outlines how to upgrade a BlackBerry Enterprise Server from v4.1.x to v4.1.7 (Service Pack 7), and is available free of charge from here.

 Download: BlackBerry Enterprise Server v4.1.7 for Lotus Domino Upgrade Guide