If the SPN is missing, duplicated, or registered to the wrong account, the handshake fails. Because the system cannot securely verify the "Principal" (the server), it gives up and throws the "Cannot generate SSPI context" error. Common "Characters" (Causes) in the Story
sql server - The target principal name is incorrect. Cannot generate SSPI context - Stack Overflow If the SPN is missing, duplicated, or registered
This error almost always points to a failure in . In a healthy Windows network, Kerberos uses a "Service Principal Name" (SPN) as a unique ID for a service. If the SPN is missing