http://blogs.technet.com/john_westworth/archive/2007/11/29/want-to-know-more-about-exchange-2007-sp1.aspxThen check out Technet Magazine (available online) at http://www.microsoft.com/technet/technetmag/ 16 New Features in Exchange Server 2007 Service Pack 1 Unlike the typical service pack, Exchange Server 2007 Service Pack 1 provides a lot more than justen-GBCommunityServer 2.1 SP1 (Build: 61025.2)