We are planing for our Exchange version from 2003 to 2010.
Current Exchange 2003 Setup
Exchange 2003 front end server
CCR clustered Mailbox servers
In new Exchange 2010 we are planing for 2 servers with external NLB external device.
Because of tight budgets we have to use same servers for new implementation also .
Please find my implementation plan below ,
1. Down one exchange 2003 Mailbox server node.
2.Install exchange 2010 with HB, MB, and CAS
3.Connect all the users to exchange 2010 remove exchange 2003 second MB node
4.Install exchange 2010 with HB, MB, and CAS on second node
5.Configure DAG between both servers
6.Configure CAS array and NLB through external HW device (Kemp etc..)
Any suggestions and help on the plan will be appreciated
Awaiting your valuable comment on this.