Online Documentation for SQL Administrator for SQL Server
User mapping
The User Mapping section allows you to browse the list of databases available on the specified server, and to map their users to the login.
Set the Map user flag next to a database name, type in the User Name and select the Default Schema of the database using the corresponding drop-down list.
Guest account enabled
This column determines whether the guest user has permission to access the database.
If necessary, use the Role membership area at the bottom to define database role(s) for each mapped user.