Adprep/ forestprp and adprep /domainprep is for upgrading Windows 2000 DC to Windows 20003 DC. You have to do this before you can add the first 2003 DC to an existing 2000 forest/domain. Setup /domainprep and setup /forestprep are for upgrading/installing Exchange. They are two different things. If you plan to implement Exchaneg 2003 in and existing Windows 2000 domain, which not many people do, you don't have to do a adprep, but you must do a setup /forestprep and setup /domainprep. Both adprep and setup do schema extensions, for Windows OS and Exchange application respectively. When you run a SP, if there are new schema attributes added, you will see the forestprep and domainprep run. Important thing to remember, if you run setup /forestprep and /domianprep in an existing Exchange 2000 organization, you will end up with mangled attributes for certain schema attribs. There is a document which tells you how to rename those attributes before you run the setup /forestprep /domainprep. If you don't run setup /forestprep and setup /domainprep there is no way in earth toy can add an Exchange server to your AD domain. Like Mike said, if you forget, it runs in the background. Its mandatory, not optional. Raj Periyasamy Systems Administrator MCSE(Messaging), CCNA -----Original Message----- From: Andrew English [mailto:andrew@xxxxxxxxxxxxxxxxxxxxxx] Sent: Thursday, April 07, 2005 12:43 AM To: [ExchangeList] Subject: [exchangelist] RE: adprep /forestprep http://www.MSExchange.org/ Actually Michael I have had case were I forgot to install it and thought it would install it on its own, it was when In stalled SP1 that I was told by the installer to run /forestprep and /domainprep before running SP1 setup again that it became obvious that it had not installed it or installed it correctly on its own. Since then I have always use the /forest/domainprep and not had any such problem again. Andrew -----Original Message----- From: Michael B. Smith [mailto:michael@xxxxxxxxxx] Sent: Wednesday, April 06, 2005 11:27 PM To: [ExchangeList] Subject: [exchangelist] RE: adprep /forestprep http://www.MSExchange.org/ It ran during the install process, even though you didn't notice it. -----Original Message----- From: exchange@xxxxxxxxxxxx [mailto:exchange@xxxxxxxxxxxx] Sent: Wednesday, April 06, 2005 11:12 PM To: [ExchangeList] Subject: [exchangelist] adprep /forestprep http://www.MSExchange.org/ what happens if you do not run adprep /forestprep and adprep /domainprep when upgrading your 2000 exchange to 2003 exchange on seperate servers? the 2003 exhcange is already installed without errors. thanks alot, ------------------------------------------------------ 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: World of Windows Networking: http://www.windowsnetworking.com 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 ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: michael@xxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx ------------------------------------------------------ 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: World of Windows Networking: http://www.windowsnetworking.com 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 ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: andrew@xxxxxxxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx ------------------------------------------------------ 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: World of Windows Networking: http://www.windowsnetworking.com 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 ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: raj.periyasamy@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx