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Bill_Swan
Copper Contributor
May 08, 2023

How to allow Kerberos authentication on SQL Express?

A self signed certificate has been installed on SQL Express but the WinUI UWP app still will not connect. The server log says:

SQL Server is attempting to register a Service Principal Name (SPN) for the SQL Server service. Kerberos authentication will not be possible until a SPN is registered for the SQL Server service. This is an informational message. No user action is required.

I am not able to connect to SQL Express with the Inventory.Sample.  
Inventory Sample on GitHub 
 
Putting "TrustServerCertificate=True" at the end of the connection string fails. 

This connection string works in a console app to test ado connection "using Microsoft.Data.SqlClient;".  
 

 

string connString = @"Data Source=.\SQLEXPRESS;Initial Catalog=VanArsdelDb;Integrated Security=SSPI;TrustServerCertificate=True;";  ​

 

 The app and SQL  Express are both on the same box.
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