In Jan. we upgraded our domain from nt4 to AD.
I upgraded the existing PDC to server 2003 and built 3 new boxes to replace our old BDC's. We no longer have any NT4 BDC's on the network.
Now , I am going to install Exchange 2003 onto a new box to replace our old Exchange 5.5 server and eveything I have been reading says you should be in native mode before you begin your migration.
Will moving to native mode break my existing Exchange 5.5 box? Can both a Exhange 5.5 and a 2003 server live in Native mode while I do the migration?
Any help would be great.