I have been trying to install the sp2 for Exchange Server 2000 and every time I try I recieve the error message stating that the domain and forestprep have not been ran. They were ran during the initial install of Exchange server 2000.Once I run the forestprep I reciev another error message..."Setup failed while installing sub-component Microsoft 2000 Active Directory schema update with an error code 0xC1037AE6 (please consult the installation logsfor a detailed description). I found the white paper on MS Technet document "XADM: ForestPrep Fails with Extending the Schema Error (Q256184)" http://support.microsoft.com/default.aspx?scid=kb;EN-US;Q256184. I followed the instructions to the "t" and I still have the same problem. Does anyone have a solution to this problem or experienced the same error? Any assistance will be appreciated.