You can use Microsoft Dynamics AX V3 Connector to connect to Microsoft Dynamics AX 2012 from Data Integration.
Use Microsoft Dynamics AX V3 Connector to securely read data from or write data to Microsoft Dynamics AX 2012. You can use Microsoft Dynamics AX V3 objects as sources and targets in mappings and mapping tasks.
Example
You want to migrate customer details from Microsoft Dynamics AX 2012 to an SQL Server database. You can use Microsoft Dynamics AX V3 Connector to read customer data from Microsoft Dynamics AX 2012 and write to an SQL Server database.