ODBC connection is not showing the fields NVARCHAR(MAX) and VARCHAR(MAX) of the tables in IDT

I created an ODBC connection using a service account. ODBC connection is for MS SQL Server 2012. When I see the structure of my tables are not showing the fields type NVARCHAR(MAX) and VARCHAR(MAX). When I can see all the fields when I used OLEDB driver. The problem is that I need to use service account to connect to the DB. I am on SAP BI 4.1 SP5

I saw the solution of this http://service.sap.com/sap/support/notes/1422831 but it's an old version of SAP BI. Any suggestion ?