.odbc.ini

[MyDB]
Description     = My Database
Driver          = FreeTDS
Servername      = W7WS6CL832J  # MSSQL server name
Database        = mydb
UID             = username
PWD             = password
Port            = 1433
Charset         = UTF-8

freetds.conf

[global]
        # TDS protocol version
;       tds version = 4.2

        # Whether to write a TDSDUMP file for diagnostic purposes
        # (setting this to /tmp is insecure on a multi-user system)
;       dump file = /tmp/freetds.log
;       debug flags = 0xffff

        # Command and connection timeouts
;       timeout = 10
;       connect timeout = 10
        
        # If you get out-of-memory errors, it may mean that your client
        # is trying to allocate a huge buffer for a TEXT field.  
        # Try setting 'text size' to a more reasonable limit 
        text size = 64512

# A typical Microsoft server
[MyDB]
        host = mssql-host  # Put MSSQL IP address or hostname here
        port = 1433
        tds version = 8.0
        client charset = UTF-8

odbcinst.ini

[FreeTDS]
Description             = FreeTDS MSSQL
Driver                  = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
Driver64                = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
Setup                   = /usr/lib/x86_64-linux-gnu/odbc/libtdsS.so
Setup64                 = /usr/lib/x86_64-linux-gnu/odbc/libtdsS.so
UsageCount              = 2
CPTimeout               = 
CPTimeToLive            = 
DisableGetFunctions     = 
DontDLCLose             = 
ExFetchMapping          = 
Threading               = 
FakeUnicode             = 
IconvEncoding           = 
Trace                   = 
TraceFile               = 
TraceLibrary            =