I didn't see a reply to this yet, so: You do not want to upgrade the DC to 2003 prior to upgrading Exchange to 2003. That's because Exchange 2000 won't run on a Windows 2003 machine. The appropriate steps are to upgrade Exchange first and then Windows. See www.microsoft.com/exchange for more information on that process. When you install Windows 2003 into a 2000 domain, you'll get *some* functionality differences, but you'll be running in Windows 2000 Active Directory functional mode until you upgrade all and flip the bit to tell it to run at a higher functionality level. You won't get much of the benefit of a 2003 native Active Directory (2003 functionality level) until then. Hope this helps. Al -----Original Message----- From: Zentarra, Marco [mailto:marco.zentarra@xxxxxxxxxxxxxxxxxxxxxxxxxx] Sent: Friday, February 13, 2004 7:21 AM To: [ExchangeList] Subject: [exchangelist] Windows 2000 ADS -> Windows 2003 ADS (one DC has Ex2k installed) http://www.MSExchange.org/ Hey all! here is another case where this list can proof that it rocks ;-) this is given: Windows 2000 Domain 2 x DC on one of the DC´s Ex2k is installed how i would do it: install a new server (2003 standard) as a dotnet-member server in our domain upgrade the 2 2k DC´s > Win2003 Server (standard) question 1: the DC with Ex2k installed....could there be any problem with Ex2k? will it work after the update properly? any experiences? question 2: after i installed a 2003 server as a member server in our 2k-domain, what will happen? will we have all the features from the 2003-ads in our domain? or only when we administrate it from the 2003 DC ? will this member server do anything with our 2 2K DC´s? TIA!!! Mit freundlichen Grüßen Marco Zentarra Systemadministrator ONLine Distributions GmbH Unna - München - Dresden Heinrich-Hertz-Str. 4 D-59423 Unna Fon 02303 - 98601-305 Fax 02303 - 98601-601 eMail marco.zentarra@xxxxxxxxxxxxxxxxxxxxxxxxxx Web http://www.communication-companies.de ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------