| Component | Requirement |
Schema master (By default, the schema master runs on the first Windows Server 2003 or Windows Server 2008 domain controller installed in a forest.)
| You must have the latest 32-bit or 64-bit Windows Server 2003 Standard Edition or Enterprise Edition operating system or the latest 32-bit or 64-bit edition of the Windows Server 2008 Standard or Enterprise operating system. For more information on Windows 2003 global catalog servers, see What is the Global Catalog.
|
Global catalog server
| In every Active Directory site where you plan to install Exchange 2010, you must have at least one global catalog server that's running either the latest 32-bit or 64-bit Windows Server 2003 Standard Edition SP1 or Enterprise Edition SP1 operating system or the latest 32-bit or 64-bit edition of the Windows Server 2008 Standard or Enterprise operating system. For more information on Windows 2003 forest mode, see Domain and forest functionality.
|
Domain controller
| You must have the latest 32-bit or 64-bit Windows Server 2003 Standard Edition or Enterprise Edition with Service Pack 1 (SP1) operating system or the latest 32-bit or 64-bit edition of the Windows Server 2008 Standard or Enterprise operating system or the Windows Server 2008 R2 Standard or Enterprise operating system.
|
Active Directory forest
| Active Directory must be at least in Windows Server 2003 forest functionality mode. It isn't supported to install or run Exchange 2003 in a domain where the domain functional level has been raised to Windows Server 2008 (or higher). The highest supported domain functional level supported with Exchange 2003 is Windows Server 2003.
|