I have run into the same issue. A solution that I used is to download the "Cisco Security Agent for IP communications", specifically, for unity (unity depends on exchange heavily) and import the policies/rules into the CSA MC. Then find the relevant policies/rules for exchange and copy them. Use the copies to make your own exchange policy. Here is the link to download the CSA for IP Communications: http://www.cisco.com/pcgi-bin/tablebuild.pl/unity3d
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...