Using the OUTPUT Clause with OLE DB in SQL Server Native Client
SQL Server Native Client (SNAC) is not supported beyond SQL Server 2012. Avoid using SNAC in new development work, and plan to modify applications that currently use it. The Microsoft ODBC Driver for SQL Server provides native connectivity from Windows to Microsoft SQL Server and Microsoft Azure SQL Database.
If you use an OUTPUT clause in an INSERT, UPDATE, DELETE, or MERGE command, the count of affected rows is not available. The application must count the number of rows in the rowset that is returned by the OUTPUT clause.