The configuration of Service Principal Names (SPNs) for the Tableau Server A common area to investigate when troubleshooting Kerberos authentication issues is the configuration of Service Principal Names (SPNs) for the Tableau Server. Incorrect or incomplete SPN configuration can prevent proper authentication, as Kerberos relies on SPNs to associate service instances with service logon accounts. Option A is incorrect because while web browser compatibility is important, it is not typically the cause of Kerberos-specific issues. Option C is incorrect as network speed, while impacting overall performance, is less likely to be a direct factor in Kerberos authentication problems. Option D is incorrect because the frequency of synchronization between Tableau Server and the domain controller is not typically a factor in Kerberos authentication issues.