What is the difference between Integrated Security = True and Integrated Security = SSPI?

Question

I have two apps that use Integrated Security. One assigns Integrated Security = true in the connection string, and the other sets Integrated Security = S

Answer 1

True is only valid if you're using the .NET SqlClient library. It isn't valid when using OLEDB. Where SSPI is bvaid in both either you are using .net SqlClient library or OLEDB.