I have been trying to install 2k7 on a new server in an existing domain with an existing exchange 2k3 infrastructure. I have followed all of the steps including running 'setup /prepareAD'. However, the setup wizard still tells me that I have to run 'setup /prepareAD'. I have verified that the schema has been upgraded, and that it has replicated throughout AD. But I still get the error, and I cannot run 'setup /PrepareDomain'. If you look in the log file it even states that AD has been updated. But then it errors with the same must run 'setup /prepareAD'. We have a forest with a child domain. Two exchange 2003 servers, one in the root domain and one in the child. I am installing 2k7 in the child domain, with the intention of removing the exchange 2k3 server when all data has been moved to the new server. Our other office (on the root domain) will be staying on 2k3 for the forseeable future. The child domain controller is currently the schema master and the GC. Any one have any ideas what i may have missed? Here is a copy of the log file for the install attempt: [7/12/2007 4:43:16 PM] [0] Starting Microsoft Exchange 2007 Setup[7/12/2007 4:43:16 PM] [0] **********************************************[7/12/2007 4:43:16 PM] [0] Setup version: 8.0.685.25.[7/12/2007 4:43:16 PM] [0] Logged on user: AD-TX\Administrator.[7/12/2007 4:43:16 PM] [0] Command Line Parameter Name='nologo', Value=''.[7/12/2007 4:43:16 PM] [0] Command Line Parameter Name='preparedomain', Value=''.[7/12/2007 4:43:16 PM] [0] Command Line Parameter Name='sourcedir', Value='D:\'.[7/12/2007 4:43:16 PM] [0] Command Line Parameter Name='fromsetup', Value=''.[7/12/2007 4:43:16 PM] [0] ExSetup was started with the following command: '/NoLogo /preparedomain /sourcedir:" /FromSetup'.[7/12/2007 4:43:17 PM] [0] Setup is choosing the domain controller to use[7/12/2007 4:43:18 PM] [0] Setup is choosing a local domain controller...[7/12/2007 4:43:20 PM] [0] Setup has chosen the local domain controller txdc.ad-tx.com for initial queries[7/12/2007 4:43:20 PM] [0] PrepareAD has been run, and has replicated to this domain controller; so setup will use txdc.ad-tx.com[7/12/2007 4:43:20 PM] [0] Setup is choosing a global catalog...[7/12/2007 4:43:20 PM] [0] Setup has chosen the global catalog server txdc.ad-tx.com.[7/12/2007 4:43:20 PM] [0] Setup will use the domain controller 'txdc.ad-tx.com'.[7/12/2007 4:43:20 PM] [0] Setup will use the global catalog 'txdc.ad-tx.com'.[7/12/2007 4:43:20 PM] [0] Exchange configuration container for the organization is 'CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ACOUSTICDIMENSIONS,DC=com'.[7/12/2007 4:43:20 PM] [0] Exchange organization container for the organization is 'CN=ADimensions,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ACOUSTICDIMENSIONS,DC=com'.[7/12/2007 4:43:21 PM] [0] Setup will search for an Exchange Server object for the local machine with name 'TXMEX'.[7/12/2007 4:43:21 PM] [0] No Exchange Server with identity 'TXMEX' was found.[7/12/2007 4:43:21 PM] [0] The following roles are unpacked: [7/12/2007 4:43:21 PM] [0] The following roles are installed: [7/12/2007 4:43:21 PM] [0] The local server does not have any Exchange files installed.[7/12/2007 4:43:21 PM] [0] Setup will use the path 'D:\' for installing Exchange.[7/12/2007 4:43:21 PM] [0] The server is cluster type: 'None'.[7/12/2007 4:43:21 PM] [0] The requested cluster type: 'None'.[7/12/2007 4:43:21 PM] [0] The installation mode is set to: 'Install'.[7/12/2007 4:43:21 PM] [0] An Exchange organization with name 'ADimensions' was found in this forest.[7/12/2007 4:43:21 PM] [0] Active Directory Initialization status : 'True'.[7/12/2007 4:43:21 PM] [0] Schema Update Required Status : 'False'.[7/12/2007 4:43:21 PM] [0] Organization Configuration Update Required Status : 'False'.[7/12/2007 4:43:21 PM] [0] Domain Configuration Update Required Status : 'True'.[7/12/2007 4:43:21 PM] [0] Applying default role selection state[7/12/2007 4:43:21 PM] [0] Setup is determining what organization-level operations to perform.[7/12/2007 4:43:21 PM] [0] The command-line option preparedomain has been specified.[7/12/2007 4:43:21 PM] [0] Because the command-line option preparedomain was specified, setup is adding the argument PrepareDomain.[7/12/2007 4:43:21 PM] [0] Because the value was specified, setup is setting the argument OrganizationName to the value ADimensions.[7/12/2007 4:43:21 PM] [0] Setup will run from path 'D:\Setup\ServerRoles\Common'.[7/12/2007 4:43:21 PM] [0] InstallModeDataHandler has 1 DataHandlers[7/12/2007 4:43:21 PM] [0] RootDataHandler has 1 DataHandlers[7/12/2007 4:43:21 PM] [0] No server roles will be installed[7/12/2007 4:43:21 PM] [0] Validating options for the 0 requested roles[7/12/2007 4:43:21 PM] [0] Performing Microsoft Exchange Server Prerequisite Check[7/12/2007 4:43:21 PM] [0] Setup is determining what organization-level operations to perform.[7/12/2007 4:43:21 PM] [0] The command-line option preparedomain has been specified.[7/12/2007 4:43:21 PM] [0] Because the command-line option preparedomain was specified, setup is adding the argument PrepareDomain.[7/12/2007 4:43:21 PM] [0] Because the value was specified, setup is setting the argument OrganizationName to the value ADimensions.[7/12/2007 4:43:21 PM] [0] **************[7/12/2007 4:43:21 PM] [0] Setup will run the task 'test-setuphealth'[7/12/2007 4:43:21 PM] [1] Setup launched task 'test-setuphealth -DomainController 'txdc.ad-tx.com' -DownloadConfigurationUpdates $true -ExchangeVersion '8.0.685.25' -Roles 'Global' -ScanType 'PrecheckInstall' -SetupRoles 'Global' -PrepareDomain $null' [7/12/2007 4:43:22 PM] [1] Beginning processing.[7/12/2007 4:43:30 PM] [1] [ERROR] The Active Directory must be modified with 'Setup /PrepareAD' before domains can be prepared for Exchange 2007.[7/12/2007 4:43:30 PM] [1] Ending processing.[7/12/2007 4:43:30 PM] [0] The Exchange Server setup operation did not complete. Visit http://support.microsoft.com and enter the Error ID to find more information.[7/12/2007 4:43:30 PM] [0] End of Setup[7/12/2007 4:43:30 PM] [0] **********************************************

OK, my bad. I came in this morning and /preparedomain ran without a hitch. Apparently, replication took longer than I expected. We only have two DCs so I thought that 15 to 20 minutes would be enough. But apparently our VPN tunnel slows it down a bit. Installing Exchange as i write.