3.6.0 MxDB for SQL Server Installation and Administration Guide (5697-7088, December 2007)

Chapter 3: Install SQL Server Instances 25
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Installation Selection. On the Installation Selection window, select
Advanced Options.
Advanced Options. Select Record Unattended .ISS file.
Instance Name. Select the Default instance or specify a name for a
Named instance. (If you will be installing multiple SQL instances, you
can specify a different name for each instance at install time.)