• Try:

    SELECT original_login_name, *

    FROM sys.dm_exec_sessions

    where login_name = 'S-1-9-3-322691058-1310504681-3474585482-2036716736'

    I got the same issue, but do not know how to fix it so SQL Server shows the correct login name or SID. So does anyone know if the issue is directly from SQL Server, AD, or from the .NET application?