I've got a 2003 AD domain in interim mode. A previous install of Exchange 2003 was done on this network, but it failed. Exchange 2003 was uninstalled from the existing Exchange 5.5 site. My question is, do I need to do any kind of cleanup in AD before attempting the migration to Exchange 2003 again? I'm just installing Exchange 2003 into an existing Exchange 5.5 site, using ADC and SRS. Is there any remnant of Exchange in AD that I should cleanup before attempting the install again?