i am facing a problem last time i configured an Exchange 2007 sp1 server on windows 2008 using our production AD (on windows 2003 server), unfortunately that exchange server crashed down & sum one else formated that server now the problem is our production AD (& deleted exchange made OUs (Universal Security Groups)in AD Users& Computers), every changings made by previous exchange is still there in AD... i tried to recover my exchange server organization through /m:recoverserver switch but all in vain, it stoped with error of deleted universal security groups.now i have to completely remove those changings made by previous exchange server then i want to create new exchange server, kindly help me out how to remove all those traces from AD...??? i am waiting for your positive reply so that i can proceed. Best Regards.

Its a bit late for a reply...however you couild have tried deleting the Server Object from ADSIEdit

Hello Yasir, Manually Removing Exchange 2007 Server 1. Run setup /m:uninstall 2. Stop and disable all the Exchange 2007 services 3. Use Registry Editor (Start->Run->Regedit) to remove these Exchange related registry keys: * HKLM\SOFTWARE\Microsoft\Exchange * HKLM\SYSTEM\CurrentControlSet\Services\MSExchange* (Delete all the keys starting with “MSExchange”) * HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft Exchange 4. Remove the entire Web Server role (don’t forget to reinstall afterwards as it’s a prerequisite for E2K7!) 5. Remove the Exchange 2007 server from Active Directory. I ended up deleting the entire “Microsoft Exchange” branch from ADSIEdit (Configuration Container > Services > Microsoft Exchange). 6. Remove the security groups created by Exchange setup from AD 7. Use Windows Explorer to find and delete exchange folders: * C:\Program Files\Microsoft\Exchange Server * C:\ExchangeSetupLogs 8. Use Windows Installer CleanUp Utility to remove all the exchange related info from the installer database. http://support.microsoft.com/kb/290301 You can also refer this article http://technet.microsoft.com/en-us/library/bb123893(EXCHG.80).aspx For Exchange 2007 installation check: http://www.msexchange.org/articles_tutorials/exchange-server-2007/migration-deployment/installing-exchange-2007-windows-server-2008.html Thanks.

if you are talking about the rolling back changes made to SCHEMA that is not possible. you cound have ran prepareAD and prepaireDomain and ran the setup /m:recoverserver again. you can still do it if you have not yet deleted the server object have you already deleted the server object ? Dhruv