Seaquel
SQL Server error code

SQL Server error 7409

SQL Server raises error 7409 at severity 16, which marks a problem with the query or data that you can correct.

Could not start distributed query using integrated login because the user is logged in using SQL Server authentication. Provide remote server login user ID and password in the connection string.
Msg7409
Severity16
Group7000–7999

Source: Database Engine events and errors