The easiest in my mind, would be to upgrade the 2000 AD to 2003. Finish the 5.5 migration and then upgrade to 2003. If that is not possible, then scrap the 2000 upgrade plans and instead use Exchange 2003 servers after upgrading the 2000 AD to 2003 AD. Al Hi All, I have an organization running Windows 2000 AD and Exchange 5.5. Now the Organization wants to have Windows 2003 AD on a different hardware and install Exchange 2003 on top of it. Can any one suggest the easiest migration plan? Thanks Rajnish Malik -----Original Message----- From: Rajnish Malik [mailto:RajnishM@xxxxxxxxxxx] Sent: Thursday, December 11, 2003 2:53 AM To: [ExchangeList] Subject: [exchangelist] Migration to Exchange 2003 Importance: High http://www.MSExchange.org/ This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible.