It has to be done on a live server, adprep must be run agianst the domain controllers holding the schema master in the forest root and the infrastructure master in each of the domians and child domains. It is advisable to have a full backup of your directory and I personally would do it out of hours as it does increase load on the DC, but there is no requirement. -----Original Message----- From: Macefield, Paul [mailto:Paul.Macefield@xxxxxxxxxxxxxxxxxxxxxxxx] Sent: Mon 10/11/2003 14:52 To: msexchange@xxxxxxxxxxxxx Cc: Subject: [msexchange] Re: ForestPrep/Domain Prep Christine I would suggest not doing it on a live DC, It can take a while to update t= he schema, and I read somewhere anything from 1 hour to several. We did our= s over a weekend to avoid risk. It does of course depend on your set-up th= ough, and things like one site or several. Paul -----Original Message----- From: msexchange-bounce@xxxxxxxxxxxxx [mailto:msexchange-bounce@xxxxxxxxxxxxx]On Behalf Of Christine Easton Sent: 10 November 2003 14:20 To: 'msexchange@xxxxxxxxxxxxx' Subject: [msexchange] ForestPrep/Domain Prep Hello, Can I run ForestPrep and Domain Prep on an active DC or should I do it after hours? It does not state it in the Documentation I found. Thanks for your help. -Christine =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Use the below link for Archives, and to set your preferences. http://thethin.net/exchangelist.cfm PLEASE NOTE: THE ABOVE MESSAGE WAS RECEIVED FROM THE INTERNET. =20 On entering the GSI, this email was scanned for viruses by the Government S= ecure Intranet (GSI) virus scanning service supplied exclusively by Cable &= Wireless in partnership with MessageLabs. =20 GSI users see http://www.gsi.gov.uk/main/notices/information/gsi-003-2002.p= df for further details. In case of problems, please call your organisationa= l IT helpdesk ********************************************************************** If you have received this email and it was not intended for you,=20 please let us know, and then delete it. Please treat our information in confidence, as you would expect us to treat yours.=20 All Treasury information systems may be monitored to ensure=20 that they are operating correctly. Furthermore, the content of=20 emails and other data on these systems may be examined,=20 in exceptional circumstances, for the purpose of investigating=20 or detecting any unauthorised use.=20 =20 =20 ===================== Use the below link for Archives, and to set your preferences. http://thethin.net/exchangelist.cfm -- No attachments (even text) are allowed -- -- Type: application/ms-tnef -- File: winmail.dat ===================== Use the below link for Archives, and to set your preferences. http://thethin.net/exchangelist.cfm