Hello Brian, may this can help here.
Configure the database to use Mixed Mode authentication with the "sa" user name and password. You can then enter a SQL Server user name and password during CA SOI installation.
■ As a best practice, the database administrator should create the SAMStore database before you install the product and create a user with db_owner privileges for the database. In this situation, the CA SOI installer requires only the user name defined for the database. Otherwise, the installer requires you to enter a database user with sysadmin privileges to create a new database.
Kind regards,
Britta Hoffner
CA Support