Exchange 2003 - Planning Roadmap for Upgrade and Coexistence: Exchange 2010 Help

Exchange 2003 - Planning Roadmap for Upgrade and Coexistence: Exchange 2010 Help

First, you upgrade all Internet-facing Active Directory sites by doing

the following:

1. Upgrade existing Exchange 2003 servers to Exchange 2003 SP2.
   
2. Deploy Exchange 2010 servers in this order:
   
   1. Client Access
      
   2. Hub Transport
      
   3. Unified Messaging
      
   4. Mailbox
      
3. Configure the Exchange 2003 front-end server and the Exchange 2010 Client Access server
   
4. Configure the Exchange 2010 Hub Transport servers (s)
   
5. Configure the Unified Messaging server(s)
   
6. Move mailboxes from Exchange 2003 to Exchange 2010
   

Then, you upgrade all internal Active Directory sites in the same manner.