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

Chapter 3: Install SQL Server Instances 27
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Next, select the SQL Server Agent service and chose the appropriate
account type. Do not check the “Auto Start Service” box.
Authentication Mode. Although you can use either mode, Mixed Mode
allows you to assign a password to the sa login. (The Service Pack
installation requires that a password be assigned to the sa account.)
Collation Setting. Choose the collation settings appropriate for your site.