Microsoft Windows Server 2003 x64 or Windows Server 2003 R2 x64, Standard or Enterprise Edition Exchange Server 2007 management tools can also be installed on a 32-bit computer running Windows Server 2003 SP1 (Standard or Enterprise Editions), Windows Server 2003 R2 (Standard or Enterprise Editions), or Windows XP SP2 rocessor x64 architecture-based computer with Intel processor that supports Intel Extended Memory 64 Technology (Intel EM64T) or AMD processor that supports the AMD64 platform; Intel Itanium family IA64 processors are not supported. Memory Minimum 2 GB of RAM per server Available hard-disk space Minimum of 1.2 GB on the hard disk where you install Exchange Server 2007 Additional 500 MB of available hard disk space per language if installing language packs for Unified Messaging beyond those included in the default installation 200 MB on the system drive Drive DVD, local, or network accessible File format Disk partitions must be formatted for the NTFS file system, not the file allocation table (FAT) file system Prerequisite software required Microsoft .NET Framework Version 2.0 Microsoft Management Console (MMC) 3.0 Windows PowerShell Microsoft Active Directory; applies to all server roles except for Edge Transport Active Directory Application Mode (ADAM) SP1; applies to Edge Transport server role