Hello I have only one Windows 2000 Server SP4 Domain Controller and a Windows 2000 Server SP4 member server with Exchange 2000 Server SP3 installed. The Domain Controller have the 5 FSMO roles of the forest. The windows 2000 domain and exchange 2000 organization are in native mode. I run forestprep from the domain controller to upgrade the active directory schema before install Exchange Server 2003 and receive the fallowing error: ***************************************************************************************************************************** [20:35:24] Creando listas de direcciones de la organización [20:35:24] Entering CAtomOrgCtChildren::ScCreateOrgLevelAddressListObjs [20:35:24] Entering CAtomOrgCtChildren::ScCreateGlobalAddressListObj [20:35:24] Updating default Exchange 2000 GAL to include Dynamic Distribution Lists [20:35:24] Leaving CAtomOrgCtChildren::ScCreateGlobalAddressListObj [20:35:24] CAtomOrgCtChildren::ScCreateOrgLevelAddressListObjs (f:\titanium\admin\src\udog\exsetdata\components\server\a_orgctchildren.cxx:1511) Error code 0X80070005 (5): Acceso denegado. [20:35:24] Leaving CAtomOrgCtChildren::ScCreateOrgLevelAddressListObjs [20:35:24] CAtomOrgCtChildren::ScAddDSObjects (f:\titanium\admin\src\udog\exsetdata\components\server\a_orgctchildren.cxx:192) Error code 0X80070005 (5): Acceso denegado. [20:35:24] Leaving CAtomOrgCtChildren::ScAddDSObjects [20:35:24] mode = 'ForestPrep' (61965) CBaseAtom::ScSetup (f:\titanium\admin\src\udog\setupbase\basecomp\baseatom.cxx:842) Error code 0X80070005 (5): Acceso denegado. [08:12:06] >>>>>>>>>> El programa de instalación encontró un error durante la tarea de componente Preparación del bosque de Microsoft Exchange de ForestPrep. -- ID:62237 -- CBaseComponent::ScSetup (f:\titanium\admin\src\udog\exsetdata\components\forprep\compforprep.cxx:513) Error code 0X80070005 (5): Acceso denegado. [08:12:06] Entering CBaseComponent::SetSubtreeComponentsToFailWithErrorInSetup [08:12:06] Leaving CBaseComponent::SetSubtreeComponentsToFailWithErrorInSetup [08:12:06] CCompForestPrep::ScSetup (f:\titanium\admin\src\udog\exsetdata\components\forprep\compforprep.cxx:613) Error code 0X80070005 (5): Acceso denegado. [08:12:06] Leaving CCompForestPrep::ScSetup [08:12:06] CComExchSetupComponent::Install (f:\titanium\admin\src\udog\bo\comboifaces.cxx:829) Error code 0X80070005 (5): Acceso denegado. ***************************************************************************************************************************** I search in Microsoft Knowledge Base about that error but don't find anything. I think that is a permission problems in the GAL but I don´t know where to look. Can anyone help me to resolve that please ? Thanks !!!!!