I have a small network (approx 28 workstations). I have one server running NT 4.0 Server sp6a and Exchange 5.5 sp3 and configured as a PDC. I will be upgrading both the server software (sbs 2000) and the Box. I need the new box to be the PDC and theold box to be the BDC. I am looking for some hints, tricks, and advice of things to be careful of from some of people who have some experience with this. Should I set up the new box seperately first, then demote the current PDC? What is the best wayto get the mailboxes from Exchange 5.5 to Exchange 2000? Any advice would appreciated