PolyBase Generic ODBC - Error calling: SQLSetDescRec - The driver does not support this function.

Hello, trying to connect PolyBase to DB2 here and receiving the notorious error: 

OLE DB provider "MSOLEDBSQL" for linked server "(null)" returned message "Cannot generate SSPI context".
Msg -2146893042, Level 16, State 1, Line 20
SQL Server Network Interfaces: No credentials are available in the security package

The connection I'm creating looks like this: 

CREATE EXTERNAL DATA SOURCE Test_PolyBase
WITH (
LOCATION = 'odbc://192.168.1.44:50000'
,CONNECTION_OPTIONS = 'Dsn={testdb};
Driver={IBM DB2 ODBC DRIVER - DB2COPY1};
uid=root;
server=192.168.1.44;
port=50000;
database=testdb;
PolyBaseOdbcSupportsSetDescRec=false'
--,PUSHDOWN = ON
,CREDENTIAL = Test_PolyBase
)

What am I doing wrong?