In order to solve the above error login to your SQL Server
Open A CMD as administrator and list your current SPNs
setspn -l servername
To change the SQL Server service account from local system to a domain user account remove current SPN from MSSQLSvc/SQLServerName:1433 computer account and add to the domain account.
Remove SPNs
setspn -D MSSQLSvc/SQLServerName:1433 SQLServerName
Add SPNs
setspn -A MSSQLSvc/SQLServerName:1433 Domain\Account
Done!
