The-target-principal-name-is-incorrect-cannot-generate-sspi-context Apr 2026

: This official tool from Microsoft Learn can scan your SQL instance and automatically identify missing or misconfigured SPNs.

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 : This official tool from Microsoft Learn can

: Check which account is running the SQL Server service. If it's a domain account, ensure the SPN is registered specifically to that account using the command setspn -L . Common Root Causes : Check which account is

: 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 ). : Recent changes to service accounts or SPNs

: Recent changes to service accounts or SPNs may not have replicated across all domain controllers yet. Recommended Troubleshooting Steps

: 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