Scaling with SQL Server

Office Communications Server 2007 R2 uses SQL Server to store user and configuration data. The Standard Edition uses SQL Server 2005 Express, which Office Communications Server Setup automatically installs. However, it is possible to use the Standard or Enterprise version of SQL Server 2005 or 2008 as well for Standard Edition. The Enterprise Edition uses SQL Server 2005 Service Pack 1 (SP1) or SQL Server 2008, which must be installed separately on the back-end server. The back-end server computer must be installed with Windows Server 2003 or Windows Server 2008 and cannot be collocated with the front-end server. Encrypted File Systems (EFSs) should not be turned on in the %TEMP% directory; if it is, setup will fail.

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