http://blogs.technet.com/jkruse/archive/2007/01/15/unified-messaging-pbx-configuration-notes-for-cisco-call-manager-preview.aspxMicrosoft Exchange 2007 Unified Messaging PBX Configuration Note for Cisco Call Manager 4.1 (Preview) http://www.microsoft.com/downloads/details.aspx?FamilyID=16fb1346-6b8f-47b0-8961-c05ccde0a88a&DisplayLang=en This PBX configuration note (preview)en-USCommunityServer 2.1 SP1 (Build: 61025.2)