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Operating System and Processor Support

Communications Server 2007 R2

Topic Last Modified: 2009-01-16

Office Communications Server 2007 R2 is available only in a 64-bit edition, which requires 64-bit hardware and the 64-bit edition of Windows Server. Client computers are not required to have 64-bit hardware or software.

All server roles of Office Communications Server 2007 R2 Enterprise Edition require one of the following operating systems:

  • The 64-bit edition of Windows Server 2008 Standard operating system, or the 64-bit edition of Windows Server 2008 Enterprise operating system
  • The Windows Server 2003 R2 Standard x64 Edition operating system with Service Pack 2 (SP2), or the Windows Server 2003 R2 Enterprise x64 Edition operating system with SP2
  • The Windows Server 2003 Standard x64 Edition operating system with SP2, or the Windows Server 2003 Enterprise x64 Edition operating system with SP2

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