I've just completed my WP installation using IIS 7.5 + SQL Server 2008 R2, the process completed perfectly and the platform is working normally.
The first plugin I installed was the ADI, but even though I configured in a similar way than the one showed in screenshots, I don't see any user imported.
The strange thing is that when I try the "Test Tool", I get a new window but showing the WP site home page. I've also noticed that the same thing is showing when I click in the "Bulk import URL" or the "Perform SyncBack for all users" URL (http://servername/wp-sqlsrv/wp-content/plugins/plugins/syncback.php).
Is it possible that the plugin does not work with IIS + SQL?