http://msmvps.com/blogs/ehlo/archive/2009/07/05/1698157.aspxWhat services do I need at my disaster recovery and backup location for my Exchange Server environment, other than mailbox servers? Offline Address Book Generation Fails on a Server That Is Running Exchange 2007 Cluster Continuous Replication Using MobileenCommunityServer 2008.5 SP2 (Build: 40407.4157)