This was has been bugging me for a while, using Symantec Backup exec but keep getting this error. Checked many a google thread and spoken to Symantec who haven't helped one bit. Any suggestions really appreciated.
The KDC encountered duplicate names while processing a Kerberos authentication request. The duplicate name is MSSQLSvc/***.*******.com:49262 (of type DS_SERVICE_PRINCIPAL_NAME). This may result in authentication failures or downgrades to NTLM. In order to prevent this from occuring remove the duplicate entries for MSSQLSvc/***.*******.com:49262 in Active Directory.