Office Communications Server 2007 uses SQL Server to store user and configuration data. The Standard Edition uses SQL Server 2005 Express, which is automatically installed by Office Communications Server Setup. The Enterprise Edition uses SQL Server 2005 SP1, which must be installed separately on the back-end server. The back-end server computer must be installed with Windows Server 2003 and cannot be collocated with the front-end server. Encrypted File Systems (EFS) should not be turned on in the %TEMP% directory; if it is, Setup will fail.
An easy way to verify that encryption is not turned on is to start Windows Explorer, type %temp% in the Address field, and press the Enter key. Right-click anywhere in the empty ...
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