I am going to be slowly moving from Exchange 5.5 to Exchange 2003. I already have Active Directory in place. My question is this:
When installing an Exchange 2003 server in an Exchange 5.5 environment and slowly migrating mailboxes onto the Exchange 2003 box, what considerations do I need to be aware of from a network perspective?
To further clarify, how should I manage my PIX box? I know when I put in the Ex2k3 box, the Ex5.5 (which is set up on the PIX with a static NAT going from its inside to its outside) which will have the ADC installed will be able replicate traffic to the Exchange 2k3 box. But once that Exchange 5.5 box goes away, do I simply need to change the NAT'ed statement to be that of the Exchange 2k3 inside pointed toward the same global address.
If I am not clear enough, post any further questions. I am very aware of the grading system here so a decent answer will receiver an A.