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Operating System and Processor Support

Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.

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