Provider Connection String and Extended Protection

Question

Good morning,
I have an application which by default uses OLEDB as Provider in the Connection String and I cannot change this. The Connection String that it uses is the following:
"Provider=SQLOLEDB.1;Data Source=ServerName;Initial Catalog=DatabaseName;Persist Security Info=False;Integrated Security=SSPI"
The database server (SQL Server 2012) and the client application are placed in two different computers but in the same domain. 
The problem is that I cannot connect to the server from the application when I configure the SQL with Force Encryption On and Extended Protection as Required or Allowed. If I disable Force Encryption, then the connection works (Extended protection as Required
and Allowed). This happens when I use Windows Authentication, with SQL Server Authentication there is no problem.
I've tried to use this connection string in a Visual Basic script and it doesn't work either. But when I change the provider to "Provider=SQLNCLI11" then it works (with Force Encryption On, Extended Protection as Required/Allowed, and using Windows
Authentication).
With SQL Server Management Studio everything works fine.
Anyone can explain me the reason why this happens? and if is there a solution?
Thank you!

Answer 1

public static void DoTestDbOracle()
// OracleConnection takes the settings from TNSNAMES.ORA
OracleConnection connOracle = new OracleConnection("SERVER=FRED.WORLD;PWD=uFRED;UID=pFRED");
String strSQL = "SELECT DISTINCT MARKET_ID, SWITCH_NO, CELL_ID, SECTOR_ID FROM FRED_TABLE";
connOracle.Open();
OracleCommand cmdOracle = new OracleCommand(strSQL, connOracle);
OracleDataReader rdrOracle = cmdOracle.ExecuteReader();
while (rdrOracle.Read())
Console.WriteLine("{0:G}-{1:G}-{2:G}-{3:G}",
rdrOracle["MARKET_ID"],
rdrOracle["SWITCH_NO"],
rdrOracle["CELL_ID"],
rdrOracle["SECTOR_ID"]);
connOracle.Close();
}