Hi All, I am running Exchange 5.5 on WindowsNT 4.0. The server, which exchange is running on is the PDC for the domain as well. Now, I am planning to upgrade to WIndows 2000 Domain and to Exchange 2000. What I plan is: 1. Upgrade this existing WindowsNT to Windows 2000 server and let it be the DC only. 2. Get a new server and install Exchange 2000 over the top of it. Can anyone suggest me which way should go ahead. BR Chand