The complete Exchange Server 2007 Transition Guide is available now. This 40 page guide will step you through the process of migrating your Exchange Server 2003 organization to Exchange Server 2007.
How to upgrade legacy Address List and Global Address List objects to Exchange Server 2007 OPath format during an Exchange 2007 transition.
How to upgrade Email Address Policies to Exchange 2007 OPath format using Set-EmailAddressPolicy.
How to remove the last Exchange Server 2003 server from the organization during an Exchange Server 2007 transition.
How to remove the Enterprise and Domain Recipient Update Services during an Exchange 2007 transition.