The-target-principal-name-is-incorrect-cannot-generate-sspi-context -

: Run setspn -X to search for any duplicate SPNs in your domain, which often causes this specific error.

: This official tool from Microsoft Learn can scan your SQL instance and automatically identify missing or misconfigured SPNs. : Run setspn -X to search for any

The error message typically signals a failure in Kerberos authentication between a client and a SQL Server. It usually means the client cannot verify the identity of the server because of a mismatch or issue with the Service Principal Name (SPN) . Common Root Causes It usually means the client cannot verify the

: The SPN might be missing, duplicated, or registered to the wrong service account (e.g., registered to a domain user when the service is running as LocalSystem ). : Try connecting using the server's IP address

: If the client resolves the server's IP address to a different name than what is stored in Active Directory, the Kerberos ticket request will fail.

: Try connecting using the server's IP address. If it works, the issue is almost certainly related to SPN or DNS resolution, as IP connections often fall back to NTLM authentication instead of Kerberos. AI responses may include mistakes. Learn more

Fix "Cannot generate SSPI context" Error in SQL Server - Microsoft Learn