Now Available! BlackBerry Enterprise Server v4.1 Service Pack 5

Amongst other new features, BES 4.1.5 now has:

Expanded Systems Compatibility – BlackBerry Enterprise Server v4.1 with Service Pack 5 is certified with Microsoft® Exchange 2007 SP1 and supports IBM® Lotus® Domino® versions 7.03 and 8.0.

Link: Blackberry Connection - BlackBerry Enterprise Server v4.1 Service Pack 5