I know when I installed SQL Server 2005 that I chose "mixed mode authentication". My client code specifies a username and password as defined in SQL Server security, so it does not need windows login. I do not want users of the workstations to be able to run SSMS unless they know the SQL Server login. How do I change my configuration so that when one tries to load SSMS, their windows login does not grant them access? I want them to have to enter a username and password as defined in the server security. I looked in the server security properties and I can choose windows login, or SQL Server AND windows.. but I don't see any option for SQL Server only? Or do I have to somehow do it at the user level in windows?