MSSQL Untrusted domain error

[Clippy]

MSSQL Untrusted domain error

[Clippy]

Check specifially for the server:
setspn -L SERVERNAME

What account is running MSSQLsvc? Does that have an SPN? If it is running a system or network you need to add an SPN for the servename$

setspn -S MSSQLSvc/sql01.domain.com:1433 DOMAIN\servername$
setspn -S MSSQLSvc/sql01.domain.com DOMAIN\servername$

Is it a SQL instance? If so you also need to add a specific SPN for that. Not sure what it is.

That's all I got. Good luck