SQL Server connection failed for domain user from Mac OS machine I have SQL Server 2008 R2 SP1. I am using connection string to connect to SQL Server. 

In connection string I am passing the driver path, server name, TCP port number, user name with which I want to connect, password, DSN name, TDS driver version number, db name.


I am using Free TDS driver for connecting from Mac OS machine.
On SQL server side I am having Windows authentication mode.
When I tried to connect by entering the user name and password of the user who has installed the SQL server or admin of the SQL server, it works fine.


But if I try with normal domain user, I am getting the SQL Server connection failed error.

After searching about it I found that some authentication is failing. Can anyone help me in resolving this issue?

I believe that some settings need to be changed or there should be some modification on connection string.
As Jason Cumberland mentioned in his comment connecting from a Mac is problematic since the Mac does not support Active Directory so is not likely to work with Integrated Security = yes or Trusted Connection = True.  You will need to use standard SQL Server Authentication where you specify the username and password, and set Trusted Connection = False.